ASP.Net user control postback

I have a usercontrol named Employees.ascx in my application.I am loading it dynamically in an aspx page using the code


ASP.Employees_ascx emp=new ASP.Employees_ascx();
panel.controls.add(emp);


In the Employees.ascx page,in Page_Load I have the code

If(!Ispostback)
{
LoadEmployees(); //to load the dropdownlist
ViewState["Sort"] = "";
}


The above code inside the if condition is never getting executed since Ispostback is always returning true.

Please advise.