"Bad serial number given in setup" Please Help

[-Collin 0]

When I go to join a server from the six launcher it loads for a little and then i get this error "Bad serial number given in setup" and I bought arma II and arrowhead through steam so I dont know how i could have a serial number. Please help! Just really want to play the DayZ mod.

[Tleilaxu 2]

use the search function of the forum,this question has been answered a gazillion times already

[FiL-UK1 0]

I have the same problem :(

I ran steam as admin, had the updater running before launching Six Launcher and I still get bad serial error

in the six updater it says dayz is incompatible

I also get this with OperationArrowhead

no entry bin/config.bin/cfgingameui/mptable.shadow