I'm trying to make a wizard with your example and can go from Tab 1 to Tab 2 with the next button without any problem but can't come back to Tab1 by clicking the Tab itself.
I have searced a long time without succes and tryed a simple example of your demo website
This code is really simple, I put the style head tag, the form, have registered the controls... but get the same problem, impossible to change any Tab by clicking. There is not any other code in that test page.
I have noticed that I have a IE js error at the bottom left of IE in any page using a Telerik control saying that "Telerik is undefined" Lign 130 caracter 5 code 0, can it be a part of the problem ?
Any idea on how to fix it and make my tabs running ?