ddclient woes

I am having some trouble getting ddclient to work with zoneedit.

So far, here's my config file:

use=web, web=http://dynamic.zoneedit.com/checkip.html, web-skip='Current IP Address: '\

protocol=zoneedit1, \

server=www.zoneedit.com, \

login=myusername, \

password=mypassword \

domainname.com

Anyway, I'm still getting "WARNING: unable to determine IP address" errors that probably mean I need to get my IP address directly from the router.