Web Forms :: Dropdown Value Being Reset

I have two usercontrols.In one I am either typing a program name or selecting from a existing list and putting it in session. Then in the other usercontrol I am checking whether the session values exists or not and then setting the selected value of another dropdown according to the program name selected in the first one. My code for setting the value in the second one is as

protected void Page_Load(object sender, EventArgs e)
{
FillProgramList(select);
if (Session["ProgramName"] != null)
{
//FillProgramList(select);
programToExecute = Convert.ToString(Session["ProgramName"]);
select.SelectedValue = select.Items.FindByText(programToExecute).Value;
}
// other code
}

FillProgramList(select) is the function filling the second DD. Now this code works perfectly in my local system but does not work on the live server where it is deployed. I feel that an extra postback is happening there which is resetting the dropdown value in the second dropdown.If so what do I need to do for preventing that. I could be wrong.In that case I would like to know your opinion and how to solve it. Since I cannot debug on the live server I do not know as to what exactly is happening. Is there a way to find out exactly the problem without debugging on the live server.