Users hacking my server?

[Killingspree303]

A few days ago a player joined my server and started doing something weird. He wrote a lot of numbers and the messages was from console. Here's when he joined, and when this occured:

[17:53:00]Client "Chris{XGBT}" spawned in server (68.10.67.220:43621)<STEAM_0:1:17892884>.
[17:53:06]Chris{XGBT}: .-337@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ !EMOSEWA SI RETSASIRHC
[17:53:08]Chris{XGBT}: .-405@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ !EMOSEWA SI RETSASIRHC

It happened 20 minutes later with another player doing it:

[18:13:27]Client "Erska" spawned in server (88.195.14.231:27005)<STEAM_0:1:12322024>.
[18:13:38]Erska: .-631@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ !EMOSEWA SI RETSASIRHC
[18:13:40]Erska: .-132@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ !EMOSEWA SI RETSASIRHC

It happened with another player doing it too a day ago... Are they using the server's .lua files or something? Does anyone know? And is there anyway I can stop it?

[Beaverbeliever]

It is a ULX error. You need to uninstall ULX until ULX or Garry makes another update. Use ASS_Menu instead

[St1flus]

Awesome is chrisaster? (BACKWARDS?)
It's a message from god?
jk
its a gmod ulx error... like beaver said, use assmode or the other 3rd one i forgot by one of the gmod.com admins

[Killingspree303]

I have downloaded ULX and ULIB with SVN, and it seems to be working great. Thank you for replying.