[sloved]why am i can't run Hydrax Demo?

idnemo

12-04-2009 14:05:45

I try 0.4 and 0.5 versions,everytime I run that demo under windows,it catch this exception.

My video card is Geforce go 7300,I aleady install new version of DirectX.Do I miss sth?

21:09:58: *** Initializing OIS ***
21:09:58: *** Initializing OIS ***
21:09:58: OGRE EXCEPTION(3:RenderingAPIException): Failed to DrawPrimitive : An undetermined error occurred in D3D9RenderSystem::_render at ..\src\OgreD3D9RenderSystem.cpp (line 2812)

eh,I reinstall my system.