I remember reading something about the 722C being a new design that does not work like the traditional printers.
Seems there was a trick to making it work remotely like you need. If I remember correctly what you need to do is install the 722C as a local printer then redirect it to the network.
However, this link may solve your problem.
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q311985It seems to be very popular so you may have to try it several times before you get through but the link will eventually work.
Ron