remix 6X and HRM connection issues

I just acquired a new fenix 6X and am trying to connect my HRM-Tri to the watch and it will not find the monitor despite the following steps being taken:

  • replaced HRM battery
  • left battery out of HRM for 10 minutes
  • wearing HRM
  • resetting fenix to factory defaults
  • Soft reset
  • resetting up fenix in connect app

help would be appreciated!