hi i try to freeze rails and getting this error. crankky:~/rails/dev/autopolishine/trunk/vendor LaiChanHuai$ rake rails:freeze --trace (in /Users/LaiChanHuai/rails/dev/autopolishine/trunk) rake aborted! Don't know how to build task 'rails:freeze' /opt/local/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1472:in `' /opt/local/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1739:in `top_level' /opt/local/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1739:in `each' /opt/local/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1739:in `top_level' /opt/local/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1761:in `standard_exception_handling' /opt/local/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1733:in `top_level' /opt/local/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1711:in `run' /opt/local/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1761:in `standard_exception_handling' /opt/local/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1708:in `run' /opt/local/lib/ruby/gems/1.8/gems/rake-0.7.3/bin/rake:7 /opt/local/bin/rake:16:in `load' /opt/local/bin/rake:16
any advice?