Please help

[Mich]

Hi today me and my freind got kicked from our own server, we are the only two server admins for that server.
When we hav got kicked it says: Mich got kicked from server by 'HACKER' , Reason "RCON:

Then it goes on to say: You were Kicked By player (RCON: system error)

And every outher member got kicked By 'HACKER' reason "Admin:"

Can anyone tell me what the hell is going on !!! ?????????????

[Timeless]

Do you use safe PW´s?
Maybe someone´s guessed your SA PW, so he can login your server and kick players via telnet, other other TS² remote tool.

Change all your SA PW and change the port number of your query (default is: 51234 TCP).