I have an IBM T40 laptop. I have been having problems with the mouse properties. I opened up the advanced properties for the mouse and selected the UltraNav tab. I keep selecting the "Standard Scroll" option but it never stays. It keeps doing the smooth scrolling. For some reason, after my laptop has been on for a while, I can get the standard scroll option to stay. But then after a while longer it reverts back by itself. It usually happens when something disrupts my wireless internet connection. I have downloaded all the latest drivers that I could find from the IBM website. What is messing this up?