RGB Device problem

I tried forcing my device driver to use RGB emulation, and for some reason the program doesn''t draw anything to the screen. Instead, I get in the VC++ debug output window, a message saying the following: Direct3D7: (WARN) :SpanInit: No fast path rasterizer chosen Direct3D7: (INFO) :======================= RGB device selected Direct3D7: (INFO) : using MMX in RGB device Direct3D7: (INFO) rofile:DrawPrimitive(Device7):TRIANGLESTRIP:D3DTLVERTEX Direct3D7: (ERROR) :Could not Flush commands in EndScene! Any ideas as to what I might be doing wrong? The last line there seems to repeat infinitely. Why can''t it flush the commands? I couldn''t find any documentation on this error in the SDK help file anywhere, or the error about SpanInit.