When I plot to a DXB-file the color and layer information disappears. In the DXB file-format reference there are a color and a layer item; new color, code 136 and new layer, code 129, but this information is excluded from the file. Is there a new plotter supporting these codes? I'm using AutoCAD LT 2000 with the plotter patch (including DXB support). I can't change the color options on the plotter from one level of gray.