acceleration crash

Hello all, This is my first post here so please bare with me. I have FSX deluxe and had it updated to sp1. No problems at all, could fly without a single problem. My wife bought me acceleration the other day and since then I can fly for not even 5 minutes before I'm at the desktop. Now I know there are other posts here about this type of thing however I'm not doing anything. What I mean by that is I'm not trying to access the menus or change views. I'm just flying in the cockpit and pow. I had posted a few times over at sim-outhouse and thought that I had the problem fixed with it being MS updates for vista. It turned out that I was wrong. This is a new install of vista ultimate, fsx+sp1, and acceleration. I haven't installed anything else but those programs. I have not updated windows at all either. I have the newest drivers on the nvidia site as well.I'm running vista ultimateGeforce 8800gts2 gigs memoryx-fi fatal1tyamd x2 6000+I'm not sure if you might need anything else as far as info goes but if so just let me know. I would really like to get this fixed or at least figure out what is going on. I was really looking forward to acceleration. The beer is on me if someone can figure this out.Thanks for your time,Headwind