They're most likely ZigBee HA 1.1 and some older sensors like that aren't fully compatible with ZigBee HA 1.2. The ZigBee Alliance really messed this stuff up, but apparently they're now, finally, working on merging all the various ZigBee standards.
Two questions, 1. did you reset the sensors before trying to add them and 2. does the Almond+ see anything at all?
Edit: Wow, those sensors are from like 2005, that's even pre ZigBee HA 1.1, so they'll most likely not work.