What does the Admin Console identify it as? My guess is that the ISY firmware doesn't actually see it as a doorlock...or it's not telling MobiLinc that it's in the doorlock family.
Please send the results of: /rest/nodes on your ISY's IP address. Example:
http://10.0.1.5/rest/nodesPlease send to:support@mobilinc.com with the name of the Door Lock so I can find it in your list and see how it's getting identified.
Wes