I have recently acquired a new laptop with a touchpad that I find difficult to use. I also have an H.P optical mouse given free with a pack (50) of H.P. photo paper, however I can't seem to get it to operate. I have plugged in the little USB gizmo, inserted the battery, switched the mouse on, (the red light underneath lights), but the cursor on the screen stays put. Any ideas, never having had one before I don't know what to expect.