ARGH!

Ok so new mouse arrived today, oh joy I thought!

mx518 btw!!!

Well I did at first, mouse feels great etc etc.

I am quite a low sens user so I want to set it at 400dpi.

I go into setpoint, try to change it, but it just won't stay at 400 at all!

It either goes back upto 1600 or to some strange 850 dps setting which shouldn't even exist.

Anyone experienced this problem, know how I could fix it?