My secondary screen dont work probably with WindowBlinds.

Hey, I recently purchased WindowBlinds and I loved it. It works perfect on my main screen, but on my secondary screen it dont "respond" when I do something. I mean I can click into folders, hear music and things like that. But I cant minimize, close or do the window bigger. It feels like the buttons in the right corner is blocked..It works on my main screen. I cant drag window's on my secondary screen.... What Can I Do, I use windows 8.