Transparent-message

Hi
I was trying to use Transparent flash message for my rails
application (based on prototype)as below
http://transparent-message.xilinus.com/

Here I put transparent_message_helper.rb  in app/helpers and the

javascript in public/javascript folder…And the test code in an rhtml
file.But when i execute I am getting the error

undefined method `transparent_flash_message’ for
#<#Class:0xb74b0cc8:0xb74b0ca0>

This is a def in the above .rb file…Is it because the file not
included?Is app/helpers not the place to put
transparent_message_helper.rb?

Please help
Sijo