DynDNS problems with DI-614+

Hi,

I'm trying to configure dynamic dns with dyndns.org on a DI-614+
running firmware 2.30. After I configure the hostname, username and
password and apply, the page is redisplayed but the data is not saved.

I've read somewhere that you need to configure the server to
members.dyndns.org, but the firmware I'm running does not give me the
option to specify the server. You only get a pull-down with three
dynamic dns providers to choose from.

Does anyone have a DI-614+ working with dyndns.org, and what firmware
are you using?

Thanks,

Bayardo