I've been searching the forums before posting this but havn't found anything that helped.

I have a MX300 pluggen in my USB port, and the mouse works good, but I can't get the scroll wheel to work.

My current xorg.conf mouse section looks like this:

Identifier "Mouse1"
Driver "mouse"
Option "Protocol" "ExplorerPS/2"
Option "Device" "/dev/usbmouse"
Option "Buttons" "5"
Option "ZAxizMapping" "4 5"

I have tried many differens protocols from xorgs documentation but nothing has worked so far. I've also tried using xev to see if the buttons do give a signal but are just incorrectly mapped.. but so far I havn't been able to get any signals from the wheel.
MX300 had a small button above the scroll wheel so I'm not sure if I should go for 6 buttons, have tried that too without success. All I have been able to acomplish is getting different button signals from the buttons with different protocols.

Any suggestions?

I'm running gentoo with a 2.6.9 gentoo-dev-source kernel.