Bad serial? New player unable to play

[Grehbeh 0]

Hello all i just downloaded everything following the step by step guide on the site. Whenever i hit join/quickmatch it starts up with a blackscreen for a couple seconds then a loading screen that says "wait a minute". After about 5 seconds the game crashes and it pops up with a a box that says

"ArmA 2 OA"

"Bad serial number given in setup"

I cannot play and i have no clue what to do to fix this. I can post a video on youtube with a link if this would help as well. Please comment fast with a fix i want to play ):

[kap (DayZ) 0]

Have you tried to join a server manually?

I have no experience in troubleshooting Arma 2 issues but if you can't find any answers, then try reinstall Arma 2 and Six updater/launcher.

Remember to run Arma 2 once and operation arrow once separately before installing Six updater/launcher.

PS good luck solving your problem

~kap

[Grehbeh 0]

I uninstalled everything, reinstalled everything. Arma 2 works perfect, i go to run arrow head and it give me the "ArmA 2 OA" "Bad serial number given in setup" shit. Im so fed up i just wanna play the fucking DayZ mod...