Silverlight: TemplateBinding Throwing an Error

This drove me crazy for about half an hour… 

I attached this style to a button

Everything compiled fine but the page wouldn’t look right and expression blend would not display it correctly and would display the error message:

The member “Content” is not recognized or is not accessible.

I have not idea how I figured out but it turns out that all I had to do is add a TargetType to the ControlTemplate…  I don’t understand why I have to do this since I already set the TargetType on the Style element…  Anyone?

The final style looked like this: