Dynamic dns problems in sep08 21:22:02 snapshot

[evan]

i have set up a dynamic dns updater for dns-o-matic as follows:

Service Type: DNS-O-Matic
Interface to Monitor: WAN
Hostname/Interface: updates.dnsomatic.com

username/password are both correct. dns-o-matic shows no update to my IP in their client administrator page.

from system.log (note: last two octets of WAN ip have been masked):

Sep  8 22:21:01 router php: /services_dyndns_edit.php: DynDns: Running updatedns()
Sep  8 22:21:01 router php: /services_dyndns_edit.php: DynDns: updatedns() starting
Sep  8 22:21:01 router php: /services_dyndns_edit.php: DynDns: _detectChange() starting.
Sep  8 22:21:01 router php: /services_dyndns_edit.php: DynDns: _checkIP() starting.
Sep  8 22:21:02 router php: /services_dyndns_edit.php: DynDns debug information: 75.182.xxx.xxx
Sep  8 22:21:02 router php: /services_dyndns_edit.php: DynDns: Current WAN IP: 75.182.xxx.xxx
Sep  8 22:21:02 router php: /services_dyndns_edit.php: DynDns: No Cached IP found.
Sep  8 22:21:02 router php: /services_dyndns_edit.php: DynDns: cacheIP != wan_ip.  Updating.
Sep  8 22:21:02 router php: /services_dyndns_edit.php: DynDns: Initial run.   Updating.
Sep  8 22:21:02 router php: /services_dyndns_edit.php: DynDns: DynDns _update() starting.
Sep  8 22:21:02 router php: /services_dyndns_edit.php: DNS-O-Matic: DNS update() starting.
Sep  8 22:21:02 router php: /services_dyndns_edit.php: DynDns: DynDns _checkStatus() starting.
Sep  8 22:21:02 router php: /services_dyndns_edit.php: DynDns: Current Service: dnsomatic
Sep  8 22:21:02 router php: /services_dyndns_edit.php: DNS-O-Matic: The hostname passed could not be matched to any services configured. The service field will be blank in the return code.