ReSharper SDK: Cannot debug plugin

Installed Software:

VisualStudio2010 SP1

ReSharper 6.1.1.

ReSharper SDK 6.1.0.51

I have installed above software and created a plugin with the project wizard. I didn't change anything in the created plugin and would like to debug the StringReverse action. But unfortunately the debugger doesn't stop at any of the breakpoints. What am I doing wrong?

With kind regards

Andy