Hi hope you can ps help me

I have been using my mx1000 on my old mx700 base/charger but noticed that the battery no longer holds its charge. (Anyway thats another matter)....So i moved it back to the original supplied base unit and i also inserted the usb plug back into a usb port, as before i had been using it on a ps2 port "without any probs"! But now the pointer keeps pusing for a few seconds which imakes it unplayable in games I can go back to ps2 but isnt usb meant to be a lot faster than ps2 or would it not make much difference? Also i have tried this on the setpoint drivers 2.14/2.2 but i seem to have probs with those also so all i use is the XP defaults

PS If there is a usb fix can you ps advise!