I am sure it is proprietary and Chris's hamsters running the servers will not let you see it :laugh: "I guess it's what separates the professionals from the drag and drop, girly wirly, namby pamby, wishy washy, can't code for crap types." - Pete O'Hanlon

Ah what an idiot! I had double quotes instead of single ones! How many times I've done that before I don't know...

My guess is that the initial setting the panel to visible = false might be happening in the page load as well? Or perhaps you have viewstate turned off? That is where I have usually found these bugs. I have done some very similar things in ASP.net. NOTE a better way to do what you are trying to do might be to use a PlaceHolder control instead. Anyway, hope that helps. Ben

A victim of my own frustration: a quick google search turned up numerous articles discussing this.