There are a couple of different problems you're describing here:
- The link does not work; have you allowed the updated version of rekordbox through your firewall? Have you tried disabling the firewall completely?
- Are you manually editing the mapping? You shouldn't need to - rekordbox functions with all of these units with built-in / default mappings, but those functions only work with the rekordbox in PERFORMANCE mode, while the controller is in MIDI mode and connected via USB.