I have textbox and lable in update panel witch i refresh with javascript __doPostBack(upEditReminder,id);

then i set both label and textbox text to current datetime

 protected void upReminder_Onload(object sender, EventArgs e)
{
    lbTest.Text = DateTime.Now.ToString();
    tbReminder.Text = DateTime.Now.ToString();

Problem is that lable is updated but textbox date is updated only once when the page is loaded but not when __doPostBack(upEditReminder,id); is triggered. I cant figure out whats the problem Your help is much appreciated