lausi

Hmm, that's strange. Have you tried reinstalling both Six Updater and ARMA II? I know it's quite a lot to download (ARMA II and OA), but if you can't get it working, it might be the only option there is. Or you could try running Six Launcher as an admin as well (if you already haven't)

Just tried starting Steam as a admin, and running Six Updater before Six Launcher, and it works like a charm. Not sure if it's a combination of both, or just the admin thing. But thanks for the help!

I too is getting this problem (i'm a steam user, if this is relevant in any way). I have tried deleting Six Updater and ARMA II and ARMA II: OA completely (no files should be left back, as i checked the folders they were installed in and deleted whatever was left) Sadly this had no effect. I am able to play regular ARMA II games online (no problems at all)