SharpDX MediaEngine on Win8 Metro

gistfile1.cs

// This code (the line with new MediaEngine(...) specifically) throws:
// HRESULT: [0xC00D36BD], Module: [Unknown], ApiCode: [Unknown/Unknown], Message: Unknown

// Startup MediaManager
MediaManager.Startup();

// Create a DXGI Device Manager
dxgiDeviceManager = new DXGIDeviceManager();
dxgiDeviceManager.ResetDevice(devices.DeviceDirect3D);

// Setup Media Engine attributes
var attributes = new MediaEngineAttributes
                      {
                          DxgiManager = dxgiDeviceManager,
                          VideoOutputFormat = (int) SharpDX.DXGI.Format.B8G8R8A8_UNorm,
                      };

using (var factory = new MediaEngineClassFactory())
using (var mediaEngine = new MediaEngine(factory, attributes, MediaEngineCreateflags.Audioonly))
    mediaEngineEx = mediaEngine.QueryInterface<MediaEngineEx>();

Possibly a silly question: But why are you disposing of the MediaEngine instance?