Error code.
PI - 30022 disconnection with server.
Im sorry Im unfamiliar with this error code and it and is not in the error code thread
if this is the patch code
/face palm
and sorry.
Most likely reason is your internet connection is faulty.
Just check internet modem and see if everything working, then if that's fine go and check the cable to your computer (or wireless card, depending on which you use.) and if that is working then you will need to contact the support service at internet provider.
If NONE of this works, then your most likely going to have to uninstall and reinstall the game, and finally if this doesn't work it means you won't be able to play Combat Arms at all.