collectd recipe error

gistfile1.txt

[Tue, 30 Oct 2012 09:34:33 -0700] INFO: Starting Chef Solo Run
/etc/chef/recipes/cookbooks/collectd/libraries/defaults.rb:47:in `vcpus': undefined local variable or method `ec2_instance_size' for #<struct Chef::Node::Collectd size="m1.medium"> (NameError)
	from /etc/chef/recipes/cookbooks/collectd/libraries/defaults.rb:30:in `load_defaults'
	from /etc/chef/recipes/cookbooks/collectd/libraries/defaults.rb:26:in `defaults'
	from /etc/chef/recipes/cookbooks/collectd/libraries/defaults.rb:9:in `defaults'
	from /etc/chef/recipes/cookbooks/collectd/libraries/defaults.rb:4:in `default_collectd'
	from /etc/chef/recipes/cookbooks/collectd/attributes/defaults.rb:2:in `from_file'
	from /usr/local/ey_resin/ruby/lib/ruby/gems/1.8/gems/chef-0.6.0.2/lib/chef/cookbook.rb:73:in `load_attributes'
	from /usr/local/ey_resin/ruby/lib/ruby/gems/1.8/gems/chef-0.6.0.2/lib/chef/cookbook.rb:71:in `each'
	from /usr/local/ey_resin/ruby/lib/ruby/gems/1.8/gems/chef-0.6.0.2/lib/chef/cookbook.rb:71:in `load_attributes'
	 ... 6 levels...
	from /usr/local/ey_resin/ruby/lib/ruby/gems/1.8/gems/chef-0.6.0.2/lib/chef/client.rb:96:in `run_solo'
	from /usr/local/ey_resin/ruby/lib/ruby/gems/1.8/gems/chef-0.6.0.2/bin/chef-solo:94
	from /usr/local/ey_resin/ruby/bin/chef-solo:19:in `load'
	from /usr/local/ey_resin/ruby/bin/chef-solo:19