Full screen with Leadtek Geforce4

I installed a Leadtek Winfast A250 TD Geforce4 Ti 4400 videocard (128 MB DDR). Good frame rates, but now I have problems using full screen mode (alt-enter) in FS2k2 (none before with my Geforce 2 MX400 card; didn't change anything else).I get a full screen display all right, but using the left alt-key doesn't bring back the menu bar, in stead it freezes the game (unfreezing after hitting the left tab again). Also, in full screen mode, the information about framerates, speed etc. in red is not completely sharp, there are little black lines in it. Also in spotview my cursor is not visible, and in cockpitview it is, but it flickers and moving the cursor makes it multiply for a few seconds (creating a line of flickering cursors). This only happens when moving the cursor on the instrument part of the view, not on the outside scenery part.Info:PIV, 1.8 GHz, 512 MB DDR, Windows XP, refresh rate at 85 Hz, 1024x768, 32 bit colours. I use the 2942 Nvidia driver. Bios 4.25.00.22.Any ideas please?Paul