[member]

Try this:

http://pastebin.com/m35873486

When a player (Team 2) enters the checkpoint, all Team 1's will get a message saying that Terrorist have invaded the checkpoint. Wehn the terrosist leave the checkpoint all Team 1's will get a message that the terrorist have left the checkpiont.

I don't recommend that you GMX the server as soon as a terrorist enters the checkpoint though.