Wheel Mouse trouble with Suse Linux 9.2 (SaX2, xorg.conf, explorerps/2, ZAxisMapping)

I wanted to activate the wheen of my USB mouse, but everytime I went to Yast2 > Hardware > Mouse the X server crashed and threw me into a text console. Also using SaX2 didn't work (there is a button under Input devices > Properties > Activate mouse wheel). Funnily the wheel usind to work in 9.1. Finally I modified /etc/X11/xorg.conf: diff xorg.conf xorg.old < Option "Name" "USB-Mouse;WheelMouse on USB" < Option "Protocol" "explorerps/2" --- > Option "Name" "USB-Mouse;PS/2 on USB" > Option "Protocol" "PS/2" The important line Option "ZAxisMapping" "4 5" was already present. If isn't you need to add it to activate the wheel.