probelm with bitmap_icons of Geomview

[yigong at mathcs.emory.edu (Yigong Liu (grad stu))]

hi, could some experts over there help me with a problem with the bitmap icons
inside the "Tools" panel of Geomview, they are all black. all other bitmaps in
the Geomview interface are black, such as the color_box inside the panel for
choosing a color for a face. there is a demo (demo33) inside the Forms Library
distribution and it is black too. the following is the main part of 
demo33.c:

  fl_init();
  fl_set_graphics_mode(0,1);
  form = fl_bgn_form(FL_UP_BOX,400.0,400.0);
    obj = fl_add_bitmap(FL_NORMAL_BITMAP,140.0,160.0,120.0,80.0,"A bitmap");      fl_set_object_color(obj,1,2);
    fl_add_button(FL_HIDDEN_BUTTON,140.0,160.0,120.0,80.0,"");
  fl_end_form();
 
  fl_set_bitmap(obj,sorceress_width,sorceress_height,sorceress_bits);
 
  fl_show_form(form,FL_PLACE_FREE,TRUE,"X Bitmap");
  fl_do_forms();
  fl_hide_form(form);

i find that if i delete  fl_set_object_color(obj,1,2); i.e. using default 
bitmap colors i can get black-white bitmaps while the cursor is outside of
the windows of Forms Library or Geomview. when the cursor enter the window
of forms or geomview the bitmaps become black again. maybe something wrong 
with the colormap? i called fl_show_colormap() and find that color index 1
is for red , 2 is for green. and i tried different graphics_modes and it 
doesn't work. can anyone give me some hints?
thanx
yigong