Dropdownlist selected index not working

Hello everyone,
I got an serious issure on my way to developing sitefinity. My dropdownlist selected index change event not working in sitefinity. While i use same code in normal page without integrating with sitefinity it works perfect. i have made usercontrol for my dropdown.
Plese suggest me the correct way.
Thanks in advance.

Dear Nrv

Please don't double post. You wont get the solution any faster.

www.sitefinity.com/.../dropdownlist-selected-index-not-working.aspx

Markus