Smart Things Home Monitoring Kit - trick to pairing door sensors?

I just got my kit and I was able to pair the motion sensor and the outlet plug OK but the two door sensors I cannot seem to get to pair. I have pulled the battery numerous times to no avail, rebooted the hub and many combinations of pushing the button while inserting the battery, then activating the app and vica verca. Can’t seem to get them going.


I got them finally. Was a pain but they are paired now.