ACE crazy ban that i dont understand...

[Cloud]

i was playng normally,then i stoped for 3 seconds like... and pressed F1 and F2 to see the rankings and etc... then suddenly i got baned!! and after that,i opened the System Console to see wtf was that,then it said on the last line:

[ACEv08h] : You have been kicked for an illegal ufunction call.

WTF???
Can anyone tell me what the hell is that??

[|uK|B|aZe//.]

what playername did you have? what server?

[SAM]

We don't use autoban. You should be ok to re-enter. I will check anyway.