I've been having trouble getting started with distributed processing, and I think I found a bug.
I was getting an error that sn.exe could not be found, and it looks like the server was looking in the wrong spot. The server only has the 8.1A SDK and VS2013. It looks like GridNode is looking for
C:\Program Files (x86)\Microsoft SDKs\Windows\v8.1A\bin\NETFX 4.0 Tools\sn.exe
But the install was at:
C:\Program Files (x86)\Microsoft SDKs\Windows\v8.1A\bin\NETFX 4.5.1 Tools\sn.exe
I copied sn.exe to the bin directory, and everything started working.
Hope that helps!