DynDNS Update Problem with Linksys WRT54G

Hi there,

I use a Linksys WRT54G V3.1, Firmware Version V4.20.8 and could update my DynDNS record via my account jmaass successfully until June 24th of this year. After that date, all DynDNS updates done by the router fail with the error message "Unknown return code". I'm at a loss. I've entered the full domain name (lfcaburg.dyndns.biz), I've supplied the correct user name and password, but to no avail.

Could you please help? I need access to my router to be able to connect to my home office network.

Thanks in advance

Joerg Maass