Error flying in missions and campaines

After getting a new computer, CFS only works in quick combat mode, not in missions or campaines.
Im recievings error message about the memory not reading the scenery.
what can I do, I prefer CFS to 2 and 3.
:-/
Im recievings error message about the memory not reading the scenery.
what can I do, I prefer CFS to 2 and 3.
:-/