2nd display not working (help!)

I'm trying to use my laptop vga output for a second monitor, but I can't get
it to work. I read the Jitter FAQ, tried the example patch, tried making
normal windows floating, nothing is working out :-(

the autodetect_monitor2 patch, leaves me with a black screen on the 2nd
display.
dragging a floating jit.window (playing a movie) stops the content from
playing. If I drag a window halfway, only the half on my primary monitor
keeps playing. Trying this with my opengl patches which use to_texture,
generates errors about "screengrab on invalid object", and blacks out the
window.

I can see my mouse and drag other stuff around from my desktop without
trouble. What's going on?

Thijs

dell inspiron 9300, winxp, jit1.5.2, nvidia go6800.