having a problem with crysis

[tenshi_musha]

i just installed crysis.i was told before that my system wouldnt support it at any playable level,but i tried out the demo anyway and it worked perfectly.i even did the system checker at the crysis website and it said my computer surpassed the recommended system requirements to run it.now that im trying to play the real deal,i am missing layers.the opening intro doesnt show the plane,just the exhaust and contrails.the next video doesnt show any of the characters or the inside of the plane,but i hear them talking.what i do see is the sky outside the plane.once i gain control,i cant look around with the mouse,cant move around,nothing.just jump and peek left and right.what do i do?