When I launch this in FSX it shuts down FSX. As soon as I select this aircraft I see it appear in the preview window for less than a second, then then the whole program immediatly closes and I'm back to the desktop. If I select it from within a flight, it just closes to the dekstop. Anybody know what the problem is or how to get the plane to work in FSX? Works fine in FS9.

There's no way to run FS9 Cloud9 Phantom in FSX, there will be a specific new version for FSX in the following months.