Hi there. I have has my Mighty Mouse, which I purchased on eBay, for a few days, and suddenly the right and left click buttons don't work. I have tried setting up the mouse again in system prefs, and I have re-paired the device. I have even checked the batteries and turned the thing on and off several times, but nothing works. The mouse tracks just fine, and the scroll ball and squeeze buttons work, but not the buttons I really need.

Any ideas?