gallio icarus debug - no source files hown

using gallio icarus v 3.2 build 676 when I click debug it opens visual studio 2010 however, I dont get any source code for my tests I do get debug info in the execution log and开发者_StackOverflow中文版 can view source in icarus for my tests, just cant add any breakpoints.

If i manually attache to gallio.icarus.exe from my test project, and stick a break in my test, I get a "no debug symbols loaded" error

I've checkd and my project is referencing the same dlls for gallio and mbunit (directly from program files/gallio/bin)