undefined method `text_field_with_auto_complete'

Dear all: I got the error in my rails 2.2.2 project on ma os x leopard. i did as follow: script/plugin install auto_complete but when i start the server and try to approach the page which used the auto_complete, it can't find the helper method as the error told: "undefined method `text_field_with_auto_complete' ", than i try this in script/console helper.methods i check the list and "text_field_with_auto_complete" can't be found, so i try helper.extend(AutoCompleteMacrosHelper) than it shows in the helper.methods list but i don't know how to fix this problem btw: auto_complete_for is in ActionController::Base.methods, i guess it must have something to do with second line in the init.rb, since first line get his jod done /auto_complete/init.rb ActionController::Base.send :include, AutoComplete ActionController::Base.helper AutoCompleteMacrosHelper

could any body kindly tell me how to fix it(or what did i do wrong), thx.

no body ever met this situation?