i get global ban

hello, today i get globan and i would like to know if they ban ip because i have bought the game 2 times and i can't play with the both

they probably global banned your dna

As far as I know, BattlEye don't ip ban.
There's a few things that states why you are banned:
1. You are adminbanned on a server, they IP ban and you will not be able to join with a different cd key unless you change your IP.
2. You bought a banned key off the market.
3. You ran some hacks.

Hope I helped!

well i think i will just buy a new arma 2 but do i have to buy arma 2 and arma 2 OA or just arma 2 OA and thank you all for your answer

---------- Post added at 01:33 PM ---------- Previous post was at 01:26 PM ----------

if i change my ip will i stay global ban ?

I've got arma 2 free, and I've only needed to replace my OA key. If you play OA, and you get global banned with OA, you will have to change your OA key I believe.
If you change ip and have the same cd key, then yes, you will stay global banned.

I'm sure that BE is working on IP Banning keys, such as the last ban wave. It seemed that as long as it was activated on your IP and you went into a game, it got banned.