cloud-start -s config/clouds.rb 
Starting cloud app (/home/yann/.ec2/testpoolparty)                                     
0 running instances (1 - 1)                                                            
/usr/lib/ruby/gems/1.8/gems/grempe-amazon-ec2-0.3.8/lib/EC2.rb:261:in `ec2_error?': The key pair 'testpoolparty' does not exist (EC2::InvalidKeyPairNotFound)
        from /usr/lib/ruby/gems/1.8/gems/grempe-amazon-ec2-0.3.8/lib/EC2.rb:199:in `make_request'                                                            
        from /usr/lib/ruby/1.8/net/http.rb:543:in `start'                                                                                                    
        from /usr/lib/ruby/gems/1.8/gems/grempe-amazon-ec2-0.3.8/lib/EC2.rb:173:in `make_request'                                                            
        from /usr/lib/ruby/gems/1.8/gems/grempe-amazon-ec2-0.3.8/lib/EC2.rb:224:in `response_generator'                                                      
        from /usr/lib/ruby/gems/1.8/gems/grempe-amazon-ec2-0.3.8/lib/EC2/instances.rb:108:in `run_instances'                                                 
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/../lib/poolparty/net/remoter_bases/ec2/ec2.rb:74:in `launch_new_instance!'                
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/../lib/poolparty/net/remoter_base.rb:120:in `launch_instance!'                            
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/../lib/poolparty/poolparty/cloud.rb:80:in `send'                                          
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/../lib/poolparty/poolparty/cloud.rb:80:in `method_missing'                                
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/cloud-start:25:in `cloaker_'                                                              
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/cloud-start:19:in `each'                                                                  
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/cloud-start:19:in `cloaker_'                                                              
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/../lib/../vendor/gems/git-style-binaries/lib/git-style-binary/command.rb:114:in `call'    
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/../lib/../vendor/gems/git-style-binaries/lib/git-style-binary/command.rb:114:in `call_parser_run_block'
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/../lib/../vendor/gems/git-style-binaries/lib/git-style-binary/command.rb:74:in `run'                   
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/../lib/../vendor/gems/git-style-binaries/lib/git-style-binary/autorunner.rb:16:in `run'
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/../lib/../vendor/gems/git-style-binaries/lib/git-style-binary/autorunner.rb:8:in `run'
        from /usr/lib/ruby/gems/1.8/gems/auser-poolparty-1.2.8/bin/../lib/../vendor/gems/git-style-binaries/lib/git-style-binary.rb:71
        from /usr/bin/cloud-start:19