Routing error on webserver but not localhost

I just deployed my app to our webserver and I am getting the Routing
error: Recognition failed for "/ICA/index/13"
But I do not get the error on my localhost.
Note: I am not getting any errors while accessing any other pages, and
yes ICA/index/13 exists

Code

I think the problem is in the popup call - but I don't know how to fix
it. Help please.

bump

This is what my dev logs have to say:

Rendering /var/www/ica/html/trunk/public/../config/../vendor/rails/
actionpack/lib/action_controller/templates/rescues/layout.rhtml (404
Page Not Found)

Processing Base#index (for 128.193.163.30 at 2007-02-14 16:10:25)
[GET]
  Session ID: 85438c4bf9c30288c64258c6fbc4c6ed
  Parameters: {} #why no parameters??

ActionController::RoutingError (Recognition failed for "/ICA/index/
112"):
    /vendor/rails/actionpack/lib/action_controller/routing.rb:522:in
`recognition_failed'
    /vendor/rails/actionpack/lib/action_controller/routing.rb:512:in
`recognize!'
    /vendor/rails/railties/lib/dispatcher.rb:38:in `dispatch'
    /var/www/ica/html/trunk/public/dispatch.cgi:10

Thanks - that fixed it. I moved from windows to unix so I guess the
naming convention got me in the switch.