Javascript POST to controller/method - 404 Not Found

[eluser]Unknown[/eluser]
I have been developing a prototype application for months currently hosted on Godaddy.com. I am now in the process of transferring the application to the clients server for testing. I have hit a wall after much reasearch and need assistance. I created an extensive post detailing the issue and associated code and config snippets on stackoverflow.com. Can someone please help me out, I am for once at a total loss and need resolution asap. FYI... Love codeigniter!

http://stackoverflow.com/questions/19063...-not-found