Redmine

What am I doing wrong here? How can I get redmine to receive emails?

root@up:/usr/share/redmine# rake --trace RAILS_ENV=production redmine:email:receive_imap host=myhostname username=myusername password=mypassword project=Company tracker=bug move_on_success=read move_on_failure=failed allow_override=tracker,project unknown_user=accept

** Invoke redmine:email:receive_imap (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute redmine:email:receive_imap
rake aborted!
Error in IMAP command received by server.
/usr/local/lib/ruby/1.9.1/net/imap.rb:1141:in `get_tagged_response'
/usr/local/lib/ruby/1.9.1/net/imap.rb:1195:in `block in send_command'
/usr/local/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/usr/local/lib/ruby/1.9.1/net/imap.rb:1177:in `send_command'
/usr/local/lib/ruby/1.9.1/net/imap.rb:1365:in `copy_internal'
/usr/local/lib/ruby/1.9.1/net/imap.rb:825:in `uid_copy'
/usr/share/redmine/lib/redmine/imap.rb:45:in `block in check'
/usr/share/redmine/lib/redmine/imap.rb:32:in `each'
/usr/share/redmine/lib/redmine/imap.rb:32:in `check'
/usr/share/redmine/lib/tasks/email.rake:141:in `block (3 levels) in <top (required)>'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:236:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:236:in `block in execute'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:231:in `each'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:231:in `execute'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:175:in `block in invoke_with_call_chain'
/usr/local/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:168:in `invoke_with_call_chain'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:161:in `invoke'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:149:in `invoke_task'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:106:in `block (2 levels) in top_level'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:106:in `each'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:106:in `block in top_level'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:115:in `run_with_threads'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:100:in `top_level'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:78:in `block in run'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:165:in `standard_exception_handling'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:75:in `run'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.1.0/bin/rake:33:in `<top (required)>'
/usr/local/bin/rake:23:in `load'
/usr/local/bin/rake:23:in `<main>'
Tasks: TOP => redmine:email:receive_imap