i have a problem

how can k2 network locked my account?

If you have being hacking on it.

or they do a misstake... 2 friends of me get banned for nothing >_>

Yeah Sometimes you get banned for nothing.That Sucks you must go to evenbalance.com or that shit and see why and talk with k2.

But i know nobody that have get his banned account.

k2 can also lock you account for spaming, swaring, racist slurs, and if punkbuster detects a detected hack on your comp. you dont even need it to be open.

k2 it's a shitty entairment so... maybe someone screen and proof you hacking :> ?