Ascx control View state lossing after Loading Page

I got an issue that We are lossing view state of control after an event occur.

i have an ascx page in DotNetNuke and i am loading some controls to that Ascx Page(textbox,Labels etc.).I need to get value(eg: Textbox.Text value) on a button click event

but when i derbugged the controls ID can be accessed,but controls value shows blank. if i typed some values over textbox that value lost.so i am thinking View state not persists over usercontrol in Dotnetnuke. Pls help.....

Navin