Make sure to take note of exactly which DayZ version is running on the server you wish to join. If it is 1.7.2.5, then see this link: http://dayzmod.com/forum/index.php?/topic/67383-hotfix-build-1725-rolling-update/ It won't be available on Six until they deem it worthy, but many servers have patched up to it. Of course you need the proper beta version as well: http://www.arma2.com/beta-patch.php/ It is likely one of these. Occasionally BattleEye requires a manual update, but I've not heard of any issues recently. Good Luck.