Modal Pop Up Extender

Hi All,

I am new to Ajax control tool kit. Please find my issue below.

I am using Modal Popup Extender to open a new url where I will edit the existing details. After I close the Pop Up window and reopen next time the modal pop up extender opening with the old values. The child page is not getting loaded.

This issue is occuring in IE8 But in IE9 this is working fine.

Can anyone please help me out to resolve this.

            var frame = $get('IframeEdit');            

frame.src = url;           this URL is loading the child page in IE 9 but not in IE 8

//document.getElementById("IframeEdit").src = url;           

 $find('EditModalPopUp1').show();