Connecting garmin HRM to Kickr

I’ve been riding with the same set up since October, it was spinning up great. Last week we had some great weather and I took my other bike out on the streets. Since I have 2 road bikes I was able to leave one on the Kickr. This week my start up screen in Zwift locates the kickr, recognizes the resistance unit and the pedal cadence. It searches for a HTM but can not locate it. I have changed the battery in my HRM, I have rebooted my computer, I have unplugged and pugged the dongle nothing seems to work. Any suggestions would be appreciated