Hey Kevin,
I know Battleye has to update so let me tell you what I've had to do.
First, verify integrity of Arma2 and Arma OA. Also using Dayz Launcher check and see if Epoch is corrupt. You can fix it right there at launcher. After all this is done, reboot your system and log in to Beatinis. If the little black box saying battleye is updating comes up, let it do it's thing. Hopefully then you'll be back in business.
Let me know if we can help you more.
See you in the game!
Hippi