Gridview RadioButton is not working after publishing my app

Hi Guys

I have a GridView with RadioButton,My dropdownlist pope up date. If I select previous date it should enable RadioButton on my GridView. This is working perfect before I publish it but after publishing it is not working any idea.Please note the problem is after publish it.

foreach (GridViewRow gvr in GridView1.Rows)

{

RadioButton cb = (RadioButton)gvr.FindControl("RadioButton4");

RadioButton cb1 = (RadioButton)gvr.FindControl("RadioButton3");

cb.Enabled = false;

cb1.Enabled = false;

}

Thanks