banned 12121212

I play on server 4-5 days and now have BAN, why ? not use any cheats.

[AMXBans] You are banned from this Server!

[AMXBans] You are permanently banned.

[AMXBans] Banned Nickname : 121212121

[AMXBans] Reason : ' Cheater '

[AMXBans] You can complain about your ban @ www.insanegaming.se

[AMXBans] Your SteamID : ' STEAM_0 : 1 : 20588731 '

unban pls, thx.