Xbee S2C pairing with LMHTZ-1ZBS

Hi. I am new to Xbee and am having trouble communicating with a Zigbee and an Ambient Light Sensor (LMHTZ-1ZBS). The error that I am receiving when scanning for a device on the Networking Working Mode is: “Initialize Device Data Device is not initialized. This may occur if device was sleeping while it was discovered”. The device doesn’t seem to be sleeping since we are receiving data on the Frames Log.