Actually, your original post shows you used command line parameters when entering your ddclient command.
As mentioned in my previous post, what I want to know is what you get when you entered ddclient WITHOUT any command line parameters.
Additionally, what is your connection setup like ?
Are you connected via ADSL, cable, dialup ???
Is there a router between you and the Modem or is the modem an integrated rounter-modem ?
Etc.
Kelvin