StyleCop don't work in SharpDevelop 5.0

Hello!

I have SharpDevelop 4.4 and 5.0 Beta on my PC, and StyleCop 4.7. In SharpDevelop 4.4 StyleCop works OK, but in last three betas (3 - 5) of SharpDevelop 5.0 when I click "Check current project with StyleCop" nothing happens. I've double checked settings and all seems OK, "Master Settings" dialog appears. When I've installed SharpDevelop 5.0 and StyleCop 4.7 on a virtual machine, there was the same problem. What am I doing wrong?