hii

i preordered crysis 2 on steam ... waited for the games like mental :/ .... now finally got it ... i cant f****** play it >_< .... when i run the game it freeze's at the 'eye' logo of the cryengine 3 logo .. i have to 'alt,tab' to the desktop ... wait bot 30 sec's .. then alt, tab back ... this works for a while but when i go to start the campain .. it plays the cutsences up to the point where the submarine's propeller goes across the screen then that games completely crash's ..... is there any way to fix this ??? .... my rig's specs are ; intel core2qaud @2.5ghz .. 4gb 1066 ram. x2 5850 in xfire ..... i have also seen that loads of other people have been having the same prob and hopefully it will be sorted soon ?.? ..... thanks