There is a long-ish thread here on setting up FTP
http://forums.dlink.com/index.php?topic=5726.0
It may help.
Once you get everything working, you may want to save the configuration to a safe place. Personally, I store all my configs for devices like this, routers, etc on a flash drive along with PDF versions of the docs. Makes it easy to recover and rebuild or replace a device.