socket error, connection refused, while uploading file to cloudfiles using carrierwave-fog

backtrace.txt

 excon (0.6.2) lib/excon/connection.rb:262:in `initialize'
 excon (0.6.2) lib/excon/connection.rb:262:in `open'
 excon (0.6.2) lib/excon/connection.rb:262:in `open_socket'
 excon (0.6.2) lib/excon/connection.rb:203:in `connect'
 excon (0.6.2) lib/excon/connection.rb:268:in `socket'
 excon (0.6.2) lib/excon/connection.rb:148:in `request'
 fog (0.7.2) lib/fog/core/connection.rb:20:in `request'
 fog (0.7.2) lib/fog/providers/rackspace.rb:17:in `authenticate'
 fog (0.7.2) lib/fog/storage/rackspace.rb:86:in `initialize'
 fog (0.7.2) lib/fog/core/service.rb:58:in `new'
 fog (0.7.2) lib/fog/core/service.rb:58:in `new'
 fog (0.7.2) lib/fog/storage.rb:18:in `new'
 carrierwave (0.5.3) lib/carrierwave/storage/fog.rb:100:in `connection'
 carrierwave (0.5.3) lib/carrierwave/storage/fog.rb:282:in `connection'
 carrierwave (0.5.3) lib/carrierwave/storage/fog.rb:294:in `directory'
 carrierwave (0.5.3) lib/carrierwave/storage/fog.rb:228:in `store'
 carrierwave (0.5.3) lib/carrierwave/storage/fog.rb:79:in `store!'
 carrierwave (0.5.3) lib/carrierwave/uploader/store.rb:59:in `block in store!'
 carrierwave (0.5.3) lib/carrierwave/uploader/callbacks.rb:17:in `with_callbacks'
 carrierwave (0.5.3) lib/carrierwave/uploader/store.rb:58:in `store!'
 carrierwave (0.5.3) lib/carrierwave/mount.rb:323:in `store!'
 carrierwave (0.5.3) lib/carrierwave/mount.rb:214:in `store_asset!'
 activesupport (3.0.4) lib/active_support/callbacks.rb:427:in `_run_save_callbacks'
 activesupport (3.0.4) lib/active_support/callbacks.rb:93:in `run_callbacks'
 mongoid (2.0.1) lib/mongoid/persistence/insert.rb:28:in `persist'
 mongoid (2.0.1) lib/mongoid/persistence.rb:47:in `insert'
 mongoid (2.0.1) lib/mongoid/persistence.rb:148:in `upsert'
 mongoid (2.0.1) lib/mongoid/relations/embedded/one.rb:29:in `bind'
 mongoid (2.0.1) lib/mongoid/relations/one.rb:21:in `block in load!'
 mongoid (2.0.1) lib/mongoid/relations/one.rb:19:in `tap'
 mongoid (2.0.1) lib/mongoid/relations/one.rb:19:in `load!'
 mongoid (2.0.1) lib/mongoid/relations/accessors.rb:28:in `block in build'
 mongoid (2.0.1) lib/mongoid/relations/accessors.rb:27:in `tap'
 mongoid (2.0.1) lib/mongoid/relations/accessors.rb:27:in `build'
 mongoid (2.0.1) lib/mongoid/relations/accessors.rb:166:in `block (2 levels) in setter'
 mongoid (2.0.1) lib/mongoid/relations/builders/nested_attributes/one.rb:30:in `build'
 mongoid (2.0.1) lib/mongoid/nested_attributes.rb:45:in `block (2 levels) in accepts_nested_attributes_for'
 mongoid (2.0.1) lib/mongoid/attributes/processing.rb:110:in `block in process_nested'
 mongoid (2.0.1) lib/mongoid/attributes/processing.rb:109:in `each_pair'
 mongoid (2.0.1) lib/mongoid/attributes/processing.rb:109:in `process_nested'
 mongoid (2.0.1) lib/mongoid/attributes/processing.rb:121:in `process_pending'
 mongoid (2.0.1) lib/mongoid/attributes/processing.rb:28:in `process'
 mongoid (2.0.1) lib/mongoid/attributes.rb:112:in `write_attributes'
 mongoid (2.0.1) lib/mongoid/persistence.rb:117:in `update_attributes'
 app/controllers/profiles_controller.rb:21:in `update'
 actionpack (3.0.4) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
 actionpack (3.0.4) lib/abstract_controller/base.rb:150:in `process_action'
 actionpack (3.0.4) lib/action_controller/metal/rendering.rb:11:in `process_action'
 actionpack (3.0.4) lib/abstract_controller/callbacks.rb:18:in `block in process_action'
 activesupport (3.0.4) lib/active_support/callbacks.rb:445:in `_run__166296229421098256__process_action__3321280459285469869__callbacks'
 activesupport (3.0.4) lib/active_support/callbacks.rb:409:in `_run_process_action_callbacks'
 activesupport (3.0.4) lib/active_support/callbacks.rb:93:in `run_callbacks'
 actionpack (3.0.4) lib/abstract_controller/callbacks.rb:17:in `process_action'
 actionpack (3.0.4) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
 activesupport (3.0.4) lib/active_support/notifications.rb:52:in `block in instrument'
 activesupport (3.0.4) lib/active_support/notifications/instrumenter.rb:21:in `instrument'
 activesupport (3.0.4) lib/active_support/notifications.rb:52:in `instrument'
 actionpack (3.0.4) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
 actionpack (3.0.4) lib/action_controller/metal/rescue.rb:17:in `process_action'
 actionpack (3.0.4) lib/abstract_controller/base.rb:119:in `process'
 actionpack (3.0.4) lib/abstract_controller/rendering.rb:41:in `process'
 actionpack (3.0.4) lib/action_controller/metal.rb:138:in `dispatch'
 actionpack (3.0.4) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
 actionpack (3.0.4) lib/action_controller/metal.rb:178:in `block in action'
 actionpack (3.0.4) lib/action_dispatch/routing/route_set.rb:62:in `call'
 actionpack (3.0.4) lib/action_dispatch/routing/route_set.rb:62:in `dispatch'
 actionpack (3.0.4) lib/action_dispatch/routing/route_set.rb:27:in `call'
 rack-mount (0.6.14) lib/rack/mount/route_set.rb:148:in `block in call'
 rack-mount (0.6.14) lib/rack/mount/code_generation.rb:93:in `block in recognize'
 rack-mount (0.6.14) lib/rack/mount/code_generation.rb:68:in `optimized_each'
 rack-mount (0.6.14) lib/rack/mount/code_generation.rb:92:in `recognize'
 rack-mount (0.6.14) lib/rack/mount/route_set.rb:139:in `call'
 actionpack (3.0.4) lib/action_dispatch/routing/route_set.rb:492:in `call'
 exception_notification (2.4.1) lib/exception_notifier.rb:25:in `call'
 warden (1.0.3) lib/warden/manager.rb:35:in `block in call'
 warden (1.0.3) lib/warden/manager.rb:34:in `catch'
 warden (1.0.3) lib/warden/manager.rb:34:in `call'
 actionpack (3.0.4) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
 actionpack (3.0.4) lib/action_dispatch/middleware/head.rb:14:in `call'
 rack (1.2.2) lib/rack/methodoverride.rb:24:in `call'
 actionpack (3.0.4) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
 actionpack (3.0.4) lib/action_dispatch/middleware/flash.rb:182:in `call'
 actionpack (3.0.4) lib/action_dispatch/middleware/session/abstract_store.rb:149:in `call'
 actionpack (3.0.4) lib/action_dispatch/middleware/cookies.rb:302:in `call'
 actionpack (3.0.4) lib/action_dispatch/middleware/callbacks.rb:46:in `block in call'
 activesupport (3.0.4) lib/active_support/callbacks.rb:415:in `_run_call_callbacks'
 actionpack (3.0.4) lib/action_dispatch/middleware/callbacks.rb:44:in `call'
 rack (1.2.2) lib/rack/sendfile.rb:107:in `call'
 actionpack (3.0.4) lib/action_dispatch/middleware/remote_ip.rb:48:in `call'
 actionpack (3.0.4) lib/action_dispatch/middleware/show_exceptions.rb:47:in `call'
 railties (3.0.4) lib/rails/rack/logger.rb:13:in `call'
 rack (1.2.2) lib/rack/runtime.rb:17:in `call'
 activesupport (3.0.4) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
 rack (1.2.2) lib/rack/lock.rb:11:in `block in call'
 <internal:prelude>:10:in `synchronize'
 rack (1.2.2) lib/rack/lock.rb:11:in `call'
 railties (3.0.4) lib/rails/application.rb:168:in `call'
 railties (3.0.4) lib/rails/application.rb:77:in `method_missing'
 passenger (3.0.7) lib/phusion_passenger/rack/request_handler.rb:96:in `process_request'
 passenger (3.0.7) lib/phusion_passenger/abstract_request_handler.rb:513:in `accept_and_process_next_request'
 passenger (3.0.7) lib/phusion_passenger/abstract_request_handler.rb:274:in `main_loop'
 passenger (3.0.7) lib/phusion_passenger/rack/application_spawner.rb:205:in `start_request_handler'
 passenger (3.0.7) lib/phusion_passenger/rack/application_spawner.rb:170:in `block in handle_spawn_application'
 passenger (3.0.7) lib/phusion_passenger/utils.rb:479:in `safe_fork'
 passenger (3.0.7) lib/phusion_passenger/rack/application_spawner.rb:165:in `handle_spawn_application'
 passenger (3.0.7) lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
 passenger (3.0.7) lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
 passenger (3.0.7) lib/phusion_passenger/abstract_server.rb:180:in `start'
 passenger (3.0.7) lib/phusion_passenger/rack/application_spawner.rb:128:in `start'
 passenger (3.0.7) lib/phusion_passenger/spawn_manager.rb:253:in `block (2 levels) in spawn_rack_application'
 passenger (3.0.7) lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add'
 passenger (3.0.7) lib/phusion_passenger/spawn_manager.rb:246:in `block in spawn_rack_application'
 passenger (3.0.7) lib/phusion_passenger/abstract_server_collection.rb:82:in `block in synchronize'
 <internal:prelude>:10:in `synchronize'
 passenger (3.0.7) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
 passenger (3.0.7) lib/phusion_passenger/spawn_manager.rb:244:in `spawn_rack_application'
 passenger (3.0.7) lib/phusion_passenger/spawn_manager.rb:137:in `spawn_application'
 passenger (3.0.7) lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application'
 passenger (3.0.7) lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
 passenger (3.0.7) lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
 passenger (3.0.7) helper-scripts/passenger-spawn-server:99:in `<main>'