Weird problem

I downloaded a full-rip CoD - World at War by Skullptura and the problem is when I try to start the Solo missions and click on a difficulty level... nothing happens.

CPU
Minimum: Intel Pentium 4 / AMD 64 3200+
You Have: Intel(R) Pentium(R) Dual CPU T3400 @ 2.16GHz
PASS

CPU Speed
Minimum: 3.0GHz or better
You Have: 2.16 GHz Performance Rated at: 3.24 GHz
PASS

RAM
Minimum: 512MB RAM (XP)/1GB RAM (Vista)
You Have: 3.0 GB
PASS

OS
Minimum: Windows XP / Windows Vista
You Have: Microsoft Windows Vista Home Premium Edition, 32-bit (Build Service Pack 26002)
PASS

Video Card
Minimum: Shader 3.0 or better, 256MB Nvidia GeForce 6600GT/ATI Radeon 1600XT or better
You Have: GeForce 9300M GS
PASS
Features: Minimum attributes of your Video Card

Required / You Have
Video RAM 256 MB / 1.5 GB
3D Yes / Yes
Hardware T&L Yes / Yes
Pixel Shader version 3.0 / 4.0
Vertex Shader version 3.0 / 4.0

Sound Card
Minimum: Yes
You Have: High Definition Audio Device
PASS

Free Disk Space
Minimum: 8 GB
You Have: 189.5 GB
PASS

I really don't know what's wrong....