关于使命4

hupo2003

我今天刚安装的使命4
一打开就弹出
----- Initializing Renderer ----
----- Client Initialization Complete -----
Attempting 44 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 separate alpha blend, glow will be disabled.

Error during initialization:
Video card or driver doesn't support separate alpha blend, glow will be disabled.
这是怎么会事呀？
我的配置是 P43。06    1GB内存  N5200的显卡