Hi i own the logitech Nano Vx laser mouse, which worked fine for nearly a year. But recently, the cursor stopped moving, and the whole mouse wouldn't work. I tried changing batteries, restarting the computer, installed the Set point Software, and tried it out on other computers and usb ports, but none worked. The light on the switch of the mouse was on, but the battery light on the top was off, and i noticed that every time i put the laser in contact with a surface, the mouse switched itself off completely. When i hold the laser in the air again, it switched on. Please Help! thank you.