I recently purchased a logitech optical mouse. The model no. of the mouse is M-BT58 and its P/N is 831115-0000. When i connected it to my PC, the mouse wasn't working at all although the laser was on! Now it'll be great if someone could really help me for this thing. Also i even lost my Driver's CD, so please if the problem is related with the drivers then please tell me the exact website from where i could download the drivers. Thank you.