Any rendering problem is complicated; specifically shadows. Check out my projective shadow mapper if you know how to set up views. If your just learning graphics programming, you should check out some tutorials online. Unfortunatley this problem requires some expertise and can be very frustrating to understand without a general background knowledge in matrices and transformations.
http://www.groundtacticsgame.com/Alienware m17x R Custom laptop
specs:
Intel Core 2 Extreme Quad CPU Q9300
2x Nvidia 280GTX 2GB vram
6GB ddr3 memory@ 1333Mhz
512GB SSD
1200p 17' screen
runs Crysis Warhead on max settings at 1200p at 90 fps
