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SlimDX + Intel GMA 950

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I have some SlimDX code that was previously working on a machine with an ATI Radeon Xpress 200M, but I'm having issues creating the device on my other machine with an Intel GMA 950. Here is where I set up the present parameters:
presentParameters = new PresentParameters();
            presentParameters.BackBufferWidth = displayMode.Width;
            presentParameters.BackBufferHeight = displayMode.Height;
            presentParameters.BackBufferFormat = Format.X8B8G8R8;
            presentParameters.Windowed = !displayMode.Fullscreen;
            presentParameters.SwapEffect = SwapEffect.Discard;
            presentParameters.Multisample = displayMode.Multisamples > 0 ? MultisampleType.NonMaskable : MultisampleType.None;
            presentParameters.MultisampleQuality = displayMode.Multisamples;
            presentParameters.PresentationInterval = displayMode.Synchronized ? PresentInterval.One : PresentInterval.Immediate;

And I've tried creating the device as Hardware, Software, and Reference, as well as with HardwareVertexProcessing and SoftwareVertexProcessing. No matter what, I get an Invalid Call error. When it is run, Multisample is equal to None. There must be something that the GMA 950 doesn't support that I have enabled, but I'm not sure what it is. Any ideas? Thanks.

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