Gaming on external monitors issues

Hey guys, I have three problems with my external displays.

I own a 23" LG lcd display for gaming, which works fine, but when I try to run the Witcher 1 (enhanced edition) it doesn't work. I can only play it on my laptop screen, or on my new Samsung 32" LED tv which I bought today (kind of wierd why it does work on one but not the other). I only have this problem with the Witcher 1 (fyi, I run vista 32 bit).

Here comes the second problem: When I use the Samsung LED tv as an external monitor, I can't use it as my only monitor, i.e. my laptopscreen keeps displaying everything too. I know how to adjust that (right click on desktop, connect external monitor, etc etc), but it only works with my LG, not with my Samsung.
Fyi, I use a vga cable with my samsung, somehow the hdmi doesn't work. My lg screen works with both a vga and a hdmi.

Aside from that I can only use my Lg screen when I disconnect the VGA port from my laptop on which the samsung is connected, but I assume that is normal?


edit: Fixed the problem with the witcher. When I tested it on ym lg screen I still used the vga cable, apparantly it works just fine with the hdmi cable.

 

Hm, today I tried playing AC2 on my external tv, and it worked just fine with the image displaying only on my tv instead of on my laptop screen aswell.

Not sure how these video problems occured, maybe its because vista needs a few tries/reboots before something actually works the way it should....

Anyway, now both my LG pc monitor and Samsung TV work the way they are supossed to.

The only problem I have now is sound lag when in combat (i.e. the sound is not slower than the image, it just stutters: when a guard shouts I hear: uhuhuhuhuhuhuhu), while it runs fine when i'm doing other stuff.