Flt Sim 2004 Text?

When I select help files or lessons in 'Century of Flight' and scroll down as I am reading, everything seems fine. However, if I now want to go over what I have just read, and I start to scroll back up the screen.....the text breaks up and smudges. It's like the page isn't being redrawn or refreshed. The only way to get it back, is to click OK/Cancel and reload the info.

Any ideas??? Is there any update patches?

Odd, do you have the latest drivers for your video card and are you experiencing any other problems with the sim.