为什么会这样？

lin281021223

----- Client Initialization Complete -----
Attempting 22 kHz 16 bit [Windows default] sound
----- R_Init -----
Getting Direct3D 9 interface...
Pixel shader version is 2.0
Vertex shader version is 2.0
Video card or driver doesn't support vertex shader 3.0 or better.


Error during initialization:
Video card or driver doesn't support vertex shader 3.0 or better.
我顺利通过使命召唤4现代战争的游戏啊~我上网问了我的配置说能玩才下载的啊~
我的配置是
CPU:AMD2600+ 主频1.61GHz
内存:512MB
显卡:ATI 9550 显存128MB