hi,
this has been a problem since Nov 2011 (first noticed with ncrunch 1.35.16b).
when ncrunch is installed and gallio plugin enabled for R#, resharper won't recognise or run any tests in the solution (for any test framework - I'm using mbunit, xunit and mspec).
currently have installed VS2010 SP1, ncrunch 1.38b and gallio plugin from nightly builds (GallioBundle-3.3.630.0-Setup-x64 in order to support R# 6.1).
In theory i could just use ncrunch as my test runner, even for long-running (mbunit) integration tests - but (unrelated issue, initially looks like something to do with codecontracts) I can't get ncrunch to build the entire solution, only some projects.
workaround is either uninstall ncrunch or disable gallio plugin - neither of which is great.