GLUT and multible windows


I just want to create another top level window in GLUT. But everytime I create
a second tob level window there is still
the drawing of the first top level window in it, but without lighting and all the other
“enabled” stuff. When I try to activate
a new reshape func with the second top level window, the stuff in the first top level window vanishes and shows up only for a second during redraw. What did I wrong?