TTT Server Problem

My server is running Trouble In Terrorist Town. I have sv_defaultgamemode terrortown set in my server.cfg. However if you look for my server in the server browser it comes up as Sandbox so no one joins it. Anyone have a fix for this?

In your cfg folder, create a new cfg file named autoexec.cfg

In there be sure to have the following:
sv_defaultgamemode terrortown