Slide and Slide Pro dongles don't work together

I have a Tivo Premiere XL4. Originally, I got a Tivo Slide and the previous non-Slide version. The Slide required a dongle and that paired fine with the RF and keyboard working. The non-Slide remote (which never had RF or a keyboard) was killed by battery corrosion, so I bought a Slide Pro directly from tivo.com - the version specifically for the Tivo Premiere series with the dongle that it requires, which is different from the dongle required by the Slide.

The Premiere XL4 has two USB...

Slide and Slide Pro dongles don't work together

Slide and Slide Pro dongles don't work together