Wrong Version of Modern Warfare 2 . Incomplete updates or an outdated game can often cause connection problems as well. So check on your PC or your console whether you have MW2 updated to the current version. Check for an update on PC (Battle.net) Open Battle.net and go to Modern Warfare 2; Click the gear next to the "Play" button Fix 1: Online Services. First, ensure there are no connection problems with other Call of Duty titles using Activisions Online Services checker. Check the PSN network for any issues as well. If there are problems with other games then the chances are it will also be affecting the Modern Warfare 2 game. cBX2.