I am trying to plot my pushpins manually, but when I go to create the
bitmap, I get an error message.  Has anyone gotten this message
before?

code:
           MapImage[] mapImages = render.GetMap(mapSpec);
           MapImage mi = new MapImage();
           mi = mapImages[0];

           Bitmap newBitmap = new Bitmap(800, 600);
           Graphics graphics = Graphics.FromImage(newBitmap);
           Bitmap mapBitmap = new Bitmap(new
System.IO.MemoryStream(mi.MimeData.Bits));

I get error message when the bitmap line that says:
Object reference not set to an instance of an object.