Moss CascadingDropDown WebService

Hello,

I wrote some usercontrols with the cascadingdropdownextender. The WebService and the UserControl resides in the dll (Action: Embedded Resource).

if i created a webapplication in asp.net 2.0 with VirtualPathProvider for load the UserControl and next for acessing the WebService, all work well.

In moss, when i construct a webpart the UserControl loads, but the webservie doesn't (Error Method 404). If i have instead controls wich not require webservice like CalenderExtender the webpart works like i expected. What could be wrong!!?

 

Thanks
...