I've used Encore CS3 in the past on Windows XP and it was a little slow and buggy at times but generally worked ok, but that was on an older computer with only 1g of ram. I got a new laptop 4g ram, Vista 64, and Duo Processor and I'm using CS4. Problem is when I tried to author a dvd in Encore and previewed it, it acted strange not showing the menu or any video in the preview window and crashing few seconds later. I created a new project and it repeated the same behavior. It also wouldn't display video played in the timeline. Makes me think it must be video card driver related even though video plays fine else where like in Premiere and I have the latest drivers for the GMA4500MHD video card installed.

Any thoughts on how to fix?