Glad you guys found a way around the issue. As another thought, I wrote above in regards to a similar issue posted by another user, it's worth noting that:

Originally posted by jimbobslimbob:

If you are not selecting an executable for your server (and instead a batch file), then you must tell GSM what the executable/process is that it needs to interact with via the "monitoring" tab - at the bottom. Click the "..." and select your "cmd.exe" - normally located in "C:\Windows\System32\cmd.exe". This is what batch files run. It's not the recommended way to do things, since the cmd.exe can be open by any number of other applications on a machine - and GSM cannot then distinguish between them - but it's totally do-able if you want to go down this route. Otherwise, it's normally better to select the server executable itself and add the commands in the relevant section there instead of using a batch file. Your choice, of course.