Hi, i just bought a wireless mighty mouse and everything seems to be working fine with it except one thing. When i click the side buttons, i have noticed that i really have to put some effort into clicking them both or it doesnt do the intended action. I was wondering if this is normal. when i had just the wired mouse i didn't really have to click it too hard at all to get the desired result. is there something wrong with my mouse. thanks for your help.