Hi xian
I have Flashmagic installed on my computer. my wireless mouse works well. I haven't heard others have similar problem as yours.
Did you check device manager window if any confict in keyboard and mouse interfaces?
Try install Flashmagic another computer, copy the install folder to your computer disk. I guess this should not affect your other computer devices. Can you use Flashmagic from this copied folder?
Have a nice day,
Jun ZhangA