Got a new mouse, having some problems. Please help?

I got a new logitech mx 1100 cordless mouse, its nice and all of the specialized buttons work. The problem I'm having is that it seems to be more sensitive when I am closer to the edge of my monitor (In other words the pointer moves slower near the center of my screen than it does near the edges) This is throwing me off a little bit because I keep missing buttons and clicking the wrong spots because i never know how far to move my mouse. I have a widescreen monitor and I think that this may be the problem, however I am not sure. Please tell me f there is a way to calibrate the mouse or enable some kind of widescreen acceleration option. I have already installed the included software (setpoint) and have found nothing but fancy hotkey settings and useless options. Let me know if you have had this problem and have done anything to fix it, im starting to miss my old cord mouse already.