How to fix waving movements on your mouse?

Hey guys. I use to play Crossfire a year ago and I just came back. Right now I have a new mouse with 500 and 1000 polling rate only and when I join a game. My crosshair moves up and down for some odd reason. People told me to change my polling rate to 125 and it'll be fine, but I don't have a mouse that changes the polling rate. Someone please tell me how to fix it with 1000 or 500 polling rate.