Just like so many others, you have decided that all of the members here have ESP? Specifically Clairvoyance?
Wrong.
Without the missing information you haven't offered, the current status is this:
"No data in = no data out".
The outline below is incomplete; there's almost nothing in it about the software.
Basic Hardware Specification Chart (Empty so far)
Processor Manufacturer: AMD / Intel
Processor Name / Type: Athlon X2 / Pentium D / C2D / dual core / quad, etc.
Processor Speed: ?.? Ghz
Operating System / Service Pack: WindowsXP with SP #?, Win7, Vista ?
System RAM: ? ? GBs (MBs, if less than 1024 ? )
Video (GPU) Manufacturer: ATI / Nvidia (
only those two are supported, PERIOD, so please answer which of them you have)
Video
Card Model: (examples) Radeon HD 6670 / Geforce GTS 450
Video Card Driver Version: Catalyst ?.? / Nforce ??.??
. . (please use the numbers, and dates, *not* the word "latest")
Video display's default screen resolution
Video
Card onboard RAM: ? ? ? MBs
Sound Card Manufacturer:
Sound Card Driver IDs:
Sound Card Model:
(And this is only for the raw hardware & driver variations. Potential software conflicts are far more likely to be game play problems, and developers cannot test for all possible program loads.)