Modal popup extender shows before page is done rendering ?

Hi

My page consists of a single linkbutton triggering the modal popup extender and a panel containing the popups controls. This is all working except one tiny thing, on each submit postback it quickly shows->hides the popup. How can I get rid of this problem?

"mpeProjects" runat="server"
TargetControlID="lbnProjects"
PopupControlID="pnlProjects"
DropShadow="false"
OkControlID="btnProjectsOK"
CancelControlID="btnProjectsCancel"
BackgroundCssClass="DialogPopupBackGround"
OnOkScript="onOK()"
>

Hi,

Please make sure you have the style attribute of the pnlProjects panel set to "display:none".

If you already have some value in the style attribute, just add the above at the end of the attribute value.

Kind regards,

sbogus.