Had the same problem, found the fix here...http://forums.dlink.com/index.php?topic=6818.0. You'll have to reboot your router after you do the workaround. Hope this gets fixed soon...
Actually, they have the same problem as I do, but I never signed up for it, or enabled it on my router, hence there is no password to access it and turn it off. I found the entry for it here in my router, and it is not enabled, it never was. Resetting my router back to factory default will be such a major problem that it would be easier just to buy a new router of a different brand, and throw this one in the trash like I did with my brand new DOA Linksys WRT110 because Linksys does
not honor their warranties.
In the mean time, everyone in the house is locked out of the Internet, along with My Wii console and Blu-ray DVD player.