Wireless Keyboard. I have a Visikey Wireless Keyboard & Mouse with a USB Signal device, and

Question

I have a Visikey Wireless Keyboard & Mouse with a USB Signal device, and when I try to get emails on it, or try to change homepage, search, volume control & mute, I can use it for a while, then it loses its signal, and doesn't work. Sometimes it will work for a day or so, them I have to reinstall it by using the dirve disc and start over again.
My email address is [e-mail] Thank You.