Can someone help?

When I use “var video_mode=12;” it works.
(my flatscreen only supports max. 1280x1024 and that’s
the resolution I get)

If I try to get the same resolution by:
res_screen=9;
dep_screen=32;
video_switch(res_screen,dep_screen,1);
It crashes when I’m closing the engine.

If I try:
res_screen=10; //or 11,12
dep_screen=32;
video_switch(res_screen,dep_screen,1);
It crashes immediately.

When I tried a different game I received
“error E2000: d3d error: D3DERR_INVALIDCALL”
I don’t know if that’s the same problem,
but I can’t find it in the manual….

Maybe someone can now guess what causes the problem.