mouse buttons

[Sherman]

I have a roller ball with four buttons and one button is set for BACK, in Windows 98 2X did fine with the BACK button and now with XP when I click on the BACK mouse button it does nothing. On the internet and also using Windows Explorer it works fine.
Any ideas?
Sherman

[nikos]

there must be an epidemic with these mice, everyone has one!
the case for 2x is closed but i'll see what i can do with the new x2