Ashover200

ive ran both of arma2 and oa once and then opened up dayzmod but it says that i need to delete files from arma2 to join a server

Hi I'm new to DayZ but im learning Ive downloaded Arma2 and Arma operation Arrowhead Ive downloaded DayZ commander Ive im installing mods via commander Ive downloaded DayZMod from Steam but On commander it wont verify arma2 or operation arrowhead (if this is a requirement for playing online DayZmod) when i run the downloaded dayzmod from steam i click to join a server and a pop up opens asking me to delete certain files from arma2 Could anyone suggest or help me resolve the issue as i would love to play online thanks and any reply greatly apreciated