I'm assuming you mean touchpad. A mouse pad is what a mouse sits on.
Do a search, I think others have mentioned issues with the touchpad. I'm not sure what their solutions are, but if you're unhappy with how its functioning, call apple or go to your local apple store.
Do not press too hard on it, you should probably have it checked first. There was another thread of someone with the same problem and he ended cracking the touchpad.