Why is my WPF-Button not clickable?

I've got a strange thing goin on here. I'm开发者_Python百科 designing a small program with Visual Studio 2010 using WPF and VB.Net but for some reason, all my buttons and checkboxes (didn't test more items) aren't clickable anymore! Even if I drag a pretty new one out of the VS-Toolbox! They've got all "IsFocousable" and "IsHitTestVisible" and "IsEnabled"-Setting set to "True". Does someone has an idea to fix that!?

Greetz!

Husky110

it was my fault...

Turns out that one of the parent controls of my button had IsHitTestVisible as false