Can't play

[InTeNsExXx 0]

I've been off DayZ for a while and came back to the 1.7.1.5 update and found that I needed the beta for it to play. I downloaded the beta off Armaholic.com and threw it in with my DayZ folder as the startup paremeters for Arma are not working (tried to use -mod=@DayZ\;@Beta didn't work. So then I threw the beta with the DayZ files and hopped on arma got on a DayZ server with 1.7.1.5 and the 93965 beta (correct beta patch) and started up and I spawned in on Debug Hill. Tried to respawn, still on debug hill. Tried a different server and respawned and nothing happened, just debug hill. I doesn't say that I have an incorrect file, and the beta patch is fine or else i couldn't join the server.

I'm very confused at what the problem is.

Please help, I'm running CO (Steam) and have been able to run DayZ perfectly up to this point.

EDIT: I've looked at the [GUIDE - STEAM] To those spawning invisible / No Debug + Errors. I tried to do what it said but I can't for the life of me find any arma2OA.exe files or anything relating to Arma that is similair. I have no clue what the problem is but It's starting to piss me off, please help.

[piemanpm 13]

Download the latest BETA. Install.

Go to C:\Program Files (x86)\Steam\steamapps\common\arma 2 operation arrowhead\Expansion\beta and copy the arma2oa.exe

Go to C:\Program Files (x86)\Steam\steamapps\common\arma 2 operation arrowhead and rename the current arma2oa.exe to arma2oa Legit.exe and paste the arma2oa.exe from the beta folder into here.

In STEAM. For the launcher options you want : -beta=Expansion\beta;ca;Expansion\beta\Expansion -mod=@DayZ;ca -nosplash