XS-Z16-CB1R not connect to ZigBee network.

I recently purchased two http://www.digi.com/products/wireless-modems-peripherals/wireless-range-extenders-peripherals/xbee-sensors XBEE temperature sensors for an industrial project. However, I am using a ZigBee device that is not digi to act as the Trust Center for the network. So far I cannot get the Temperature Sensors to connect to the ZigBee TC device. Since the Temp Sensors don’t have any options on them I’m forced to just change settings on the TC device. With a sniffer I can see the beacon and response from the TC, but they never seem to connect. What settings should I use on the TC. is the Digi Sensor not fully ZigBee Pro compatible so it can’t be recognized?