Hi Net,

 Even I experienced the same problem...

but I have not made any changes to the structure of the website, the usercontrol in question was working perfectly from a long time. It was just on saturday that I got this problem. I tried the solution that you have given here ie. transferring the usercontrol to the same folder as the page. But it will require changing the register tag in all the pages that include the said control. Moreover, did u find the reason why this problem occurred in the first place?

Awaiting your reply.