Panel Disappears in Full Screen Mode

Hi,
I've been playing with FS2004 for a week or so now and have a strange issue when I go to full screen mode from the "windowed" mode- the flight panel disappears- leaving the bottom of the screen blank. Strangely, it comes back when- and only when- I bring up the kneebook function. I'm using an 800 mhz PIII with 384megs of RAM and a Geforce 5200 card.
Any ideas?
I've been playing with FS2004 for a week or so now and have a strange issue when I go to full screen mode from the "windowed" mode- the flight panel disappears- leaving the bottom of the screen blank. Strangely, it comes back when- and only when- I bring up the kneebook function. I'm using an 800 mhz PIII with 384megs of RAM and a Geforce 5200 card.
Any ideas?