I"am sorry my friend but seems to me that your PC is going to one of those PC kapup moments. The only easy solution is to reinstall CFS2. Its very easy and you will not have to lose all your addon planes. This will probably fix your problem.The only thing that you need to keep in mind is that you need to backup the World/ Texure and Scenery folders inside the SCENEDB Folder if you had them upgraded.
Here are instructions on how to reinstall your CFS2 program and not to lose most of your addon By Hagar:
http://www.simviation.com/lair/cfs2faq.htmJust remember to press the CFS2 command Keyboard instead of the CFS1 ones. This way you will be able to communicate with your wingmen and also be able to use all the other CFS2 featres.
I hope I have been able to help you out.
James007
PS Jemc you need to upgrade your Memory from 256mb to at least 1,112 for and this and other Sims work properly in you PC. Its easy to installand and cheap now"s days. Good luck!
I"am sorry your 256 mb is in the memory of your vidoecard. Your Video card is a find card.
Come back if you need additional help