Gurthang

Hello everyone, so I just reinstalled ArmA 2 on my PC but I seem to be being a victim of the FADE protection despite of having a retail copy. I played yesterday with no problems, but since today the crosshair is getting all over the place. Did I do something wrong? Do I need to activate the game somewhere? My specs are: Intel C2D E4500 @2.2GHZ ATI Radeon HD 4870 512 Mb 3.25Gb RAM (Actually it's 6Gb, but I only got a 32-bit system yet) Windows 7 Ultimate 32-bit