Not sure. Can you confirm the following steps were performed and the EZSrve said it found the device?
1) Go to add a new device
2) Select a new group
3) Enter a name
4) Hit save
5) When prompted to add a new record, say yes
6) The EZSrve will go into linking mode, press the corresponding button on the KPL you want linked for about 6 seconds
7) The EZSrve will say it found the device and stop linking.