Well, I'm running Win7, not vista. The regular 6.1.4 plugin works just fine, though. Maybe I missed a setting on my compile? I had to choose the ReleaseDX9 and DebugDX9 options. The other two need the DX8 SDK, I'm assuming, because it gave me the "can't find d3d8x.h error"
Here's a link to the compiled DLL's
Update: It only gives me the DirectX 8 error message when I turn on anti-aliasing.