When you are trying to run “.loadby sos mscorwks.dll ” and get error Unable to find module ‘mscorwks’ then the most probable issue might be that your debugger is trying to break into the app before CLR is loaded. in that case you can run
.loadby sos mscorwks.dll
and it will work.
other thing to notice is if you are having .Net framework 4.0 app then you should use
.loadby sos clr