FSX use to work great until....

If someone could help.
1.Prior to installing FSX Accelerator instant replay worked. Since the installation instant replay causes the game to crash.
2.After flying a plane from FSXA planes from FSX do not show up unless you exit the game and start it up again.
System
Alienware M9750
2 G Ram
160 hd
Intel dual proc. 2.0 gh
Nvidia 7950 gtx sli
All drivers are current
What is causing this?
Thanks

 

FSX Acceleration

 

Continued to end up with more issues. Have unistalled FSX A. I can't seem to find answers. When I posted on another forum they said the problem is playing on a notebook.

 

They're Wrong, your notebook is very powerful, plenty powerful for FSX.

 

Yeah, your notebook should run it great.... my X205 SLi1 runs it awesome at native resolutions and high settings, much better than my desktop did..... I guess I'd try uninstalling it and reinstalling it without acceleration, make sure it runs properly, then try adding Acceleration again.... just make sure the DX10 preview is turned off. Maybe something just screwed up during install, as mine with Acceleration runs great.... definately shouldn't be a notbeook related issue, and is a great game in my opinion!

 

Thanks for the suggestions I will try them out.

 

I installed FSX Deluxe about a year ago and everything worrked fine. So why not get FSX Accelerator? The planes stutter and don't fly smooth poor frame rate, also crashes Computer etc.. Tried everything and decided to get rid of it. But now I cant reinstall the origional FSX it won't accept the key code and gives me 1/2 hour trial. I payed for this stuff. How do I reinstall FSX Deluxe ???
Intel Duo 2 ghz, ram 2gb, Nvidia 383mb 8400gs GForce, Vista..

 

Do a clean install of FSX and Acceleration per this guide:

Link

FSX is a very finicky game, annoyingly so, I hope FS11 is improved.