For about a week now, no servers come up on my multiplayer menu for Arma 2, Arma 2: Operation Arrowhead, or Dayz mod. anyone know how to fix this?

I just got my computer and wanted to play DayZ, so i joined a server and it kicked me and said "Global Ban #b6ab7b" Please Help!

I've looked through several threads replying to people with the same enquiry, but try as i might i cannot reduce responses in these threads into one consistent peice of information 1) is this game supposed to work (be playable)? If it is than i might invest effort in making it work, if it isn't then obviously i wont....

WWhen i start it up it comes up with the Bad serial number and i cant play.. HELP

just like yer mum :OOOOOOOO