Cannot print on Windows network

[Jeroen van de Nieuwenhof]

> I run cups 1.2.8 on Ubuntu Feisty Fawn. At work i try to connect to a Oce printer over the network, but i can't get it to work. According to my company the printer is located thorugh an url that looks like this: http://po.myorganisation.com/printers/PrinterName/.printer
>
> In Cups i connect using the ipp protocol, and fill in the url.
>
> I can't get it to print though.
>
> When i want to that printer on Windows i need to fill in a username and password. Where can i do that in Cups?
>
> This is what my error_log says:
>
> E [24/Apr/2007:10:57:28 +0200] CUPS-Add-Modify-Printer: Unauthorized
> E [24/Apr/2007:10:57:59 +0200] [Job 131] No %%BoundingBox: comment in header!
> E [24/Apr/2007:10:57:59 +0200] PID 12007 (/usr/lib/cups/backend/http) stopped with status 2!
>
> Any ideas on how to solve this?

Okay, i've put the log_level to debug2 and got this output:

http://files.vandenieuwenhof.nl/cups_error_log

Maybe it helps