Just got a new Intellimouse Explorer and I'm having trouble getting any of the buttons or scroll wheel to work. I've tried the Microsoft drivers, XLR8 Point and Scroll Mouse, and USB Overdrive 1.3.7 and none of them give me any functionality of the extra buttons or scroll wheel. I've got a yikes 400 G4 running system 9.0.4. I've been using an Interex usb wheel mouse with the XLR8 softare and everything works fine there...I'm wondering if I have a bad Intellimouse. Help??