I'm developing my first app here, and I'm having a problem.  Any help is greatly appreciated.

I am using an external iframe, and I can get my app to show up when I first start it, using the external domain, for example:

http://mydomain/index.php 

If I have a link within the page that accesses my original app (which is really just a dispatcher, like so:

http://mydomain/index.php?action="foo",

it gives me an exception that it's trapping a rogue request. 

What exactly do I have to do to be able to call my own app here?  I'm not understanding this, all my other pieces are working fine, but this one is annoying the heck outta me. 

Thanks in advance for any advice.

 [EDIT]

For more information, I'm using smarty, and going through the same steps as the initial call.   

DenDude