[Ancient]

If you are using dedicated server open server.cfg and put mp_autoteambalance 0
If not dedicated open listenserver.cfg and put the command in there.
If the above doesn't work check out amxx.cfg in addons/amxxmod/configs/amxx.cfg

In podbot.cfg I didn't find any autobalance stuff, AmX X has autobalance on default.
So check amx x.cfg also.

When editing these files, these new settings will work when you restart the server.