I install nvidia geforce 8400gs. I want to use the multiple display so that i can view video through my s-video but never work.I bought another card with HDMI out still the same problem. I thought may be i have problem with my driver or nview I need help .Thank u

The model number would be helpful in determining exactly which card you have but, s-video should certainly work and they also make an adaptor that converts s-video to component video if that's something that you want. You will have to, if you haven't already, get into "control panel" and then get into "personalization". There you should see your two monitors. Here you can adjust your resoulution. You will also have to check in "device manager", click on the box(on right) next to "monitors", it should show your 2 monitors. Right click on each, one at a time, and in the dropdownlist you should see "disable" if you see "enable" click on that and exit. If you see any warnings, !, ?, or a yellow triangle, click on thta and follow proceedure. You may also want to click on the box next to "display adaptors" and check for warnings, right click on and make sure it' also says "disable" in list with both monitors connected.