vay be,benim ekran kartı da yetmiyormuş

Video Card
Minimum: 256MB NVIDIA 7900+ / 256MB ATI X1900+
You Have: Radeon X1650 Series (ATI Radeon Graphics Processor (0x71C7))
Video Card Features - Minimum attributes of your Video Card
Video RAM: Required - 256 MB , You have - 1.0 GB
Video Card 3D Acceleration: Required - Yes , You have - Yes
Video HW Transform & Lighting: Required - Yes , You have - Yes
Vertex Shader Ver.: Required - 3.0 , You have - 3.0
Pixel Shader Ver.: Required - 3.0 , You have - 3.0