about my mouse .

Hey guys , i use the Razor Deathadder .

my prob:

When im playing , and move my crosshair from left to right (or right to left) , i have not a straight line (i move my hand exactly) ..... its feel like wave , not much , but it is there and sucks . why is that so? my mouse before was cheap (10eur and wlan) she was exater i think.
or i need to change setting in the Mouse Editor?

i hope u understand me ^^

Thx