Updatepanel on masterpaster won't change at linkbutton' postbackurl

Hi Guys,

On my masterpage I have an update panel, I want to show an hidden panel, meanwhile I want to show the content of a new page in the contentsection.

If I use a postbackurl: I have to click twice on the linkbutton to show the hidden panel (first to go to the page, second to show the panel, I don't want that.)
When I don't use a postbackurl I can not load the content page of the linkbutton.

Make I myself clear??
How can I solved this problem.


btw I tried already in the load of the panel, the comandname of the linkbutton.

cheers
Me!