Incorrect Version ??

[[email protected] 0]

This server is running an incorrect version of the server side application. You cannot play on this server. If you are the server admin please contact DayZ staff.

I have been playing without any problems all day, Now I get this message every time, I try to join a server.

[Nogaxeh 0]

I'm having the same issue as you, seems to be a beta patch issue, Six launcher doesn't want to auto-update, and even manually updating I still seem to be a the previous beta patch.. :(

**Edit** It seems to be an issue with the latest Arma II beta patch, I used 6 updater, and it never downloaded the new patch. I did it manually (twice) and the patch does not seem to "stick" it keeps going back to the previous patch, I checked the files in the directory, and the ones relevant to the patching process all indicate that today was the last time they were modified...

Anyone else had this problem in the past? Any ideas what may be going wrong or how to fix it?

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I found a solution http://forums.bistudio.com/showthread.php?90317-!Beta-Troubleshooting-Tips-FAQs

to do that go to your \Steam\steamapps\common\arma 2 operation arrowhead\Expansion

delete the beta file there and manually re-install the beta patch.. problem solved..