Accessing a windows network printer with CUPS

[d.knoll at ugrad.unimelb.edu.au]

Hey,
I was just after some help. I'm new to Linux and I'm trying to add a windows network printer through http://localhost:631
When I do so it promts for my CUPS username and password, but I don't know what it is? Can anyone help me?
I've tried my login name and password as well as my network login name and password, but neither with success.
I'd appreciate any help I can get.
Thanks
Dylan Knoll