do i need to disconnect my wired mouse/kbd to install the wireless mouse/kbd. i have a logitech wireless and downloaded and installed their software inserted the dongle but that did not seem to work. i thought the wireless was pnp. i downloaded etc. with the wired mouse/kbd still attached. did that create a problem? never tried wireless so am not sure how to do it. the logitech didn't have any instructions. dell inspiron w11