Ok, as I mentioned in the thread title my 3rd and 4th mouse button as well as the mouse wheel do not work in MWLL. They work fine in Windows 7 (64bit) though.
I have a Microsoft Wireless Laser Mouse 5000 and proper intelli drivers installed. I actually bought this new mouse since my old mouse had only 2 buttons and the wheel was broken. Now I am pretty sad that it doesn't work. Any idea how to change things?