Well , ending up figuring it out by myself. It appear that I probably placed the 2 remote in a weird state with the prior pairing and they were no longer being able to 'pair' themselves with the EIM. I found ( not documented ) that if you keep the connect button ON long enough on the remote , at one point the light will turn red and then you'll be able to 'pair' it again by clicking on the connect button once the red light turn off.