MeSoVorney

Hi there, First of all thank you for your time. I am very new to this. I purchased Arma 2 and Arma 2 OA from steam official (during the offer steam done)( and ran to menu) I installed Dayz Mod for arma 2 Dayz Commander and installed Epoch Also ran the patch Unfortunately i am trying to access my friends server but comes up with the bad version ....well how can it be im pretty positive i done everything right . Its as if its a bad key but i bought and installed from steam servers. I tried a normal Dayz server without any mods and it worked well. Can anyone help please Thanks in advance. Any questions no fear im going to be here as im desperate to play this