setting up cups printer over samba

[Micha Feigin <michf@post.tau.ac.il>]

I am trying to connect to a hp815c printer connected to a windowsXP pro
computer via samba.

I tried two users, one with password and one without and added a
printer with both gnome-cups-manager and the web interface (which seems
to ignore usernames and passwords BTW). When I try to print I see the
job appear in the printer queue on windows as user guest (although I
gave a valid user/password) and after several seconds of supposedly
trying to print it marks the page as error.

Any ideas on where to go next ?