Problem with logitech dual action game pad

anyone else having problems in going diagnal with digital pad.. works fine for the analog stick but it wont go diagnal with the pad.. i tried the most current drivers and stuff but still no luck.. every thing else works fine for me
im running
athlon xp2100
1gb ram
G-force 3 ti 500
win XP pro

any sugesstions or am i SOL

thanks
Flash