Visual-studio – How to debug mbunit/Gallio unit tests in visual studio

I am trying to figure out how I can hit breakpoints in my unit tests that are written with MbUnit/Gallio. I tried running Gallio.Icarus, attaching vs debugger to it, the breakpoints weren't hit.
Next I tried to start Gallio.Echo from project properties, but I was getting an error message, after supplying the dll, saying only .exe's can be tested.
The unit test runs fine from Gallio.Icarus, however, I am unable to debug them.

Thanks!