Hi, I'm using a microsoft intellimouse (USB to keyboard) on an iMac (late 2006), OSX 10.5.8 I recently connected my mighty mouse to the keyboard and changed some settings on the middle mouse button. Later I reconnected my microsoft mouse, and tried to change the settings back. Now, everything works as per usual, but my middle mouse click-drag scroll doesn't work I can scroll by using the wheel up and down just fine, but if I try to click-drag, nothing happens. Is there any way I can fix this? Thanks.