CUPS problems

[giorza at aliceposta.it]

Hi!

When I try to use CUPS with the browser administration (http://localhost:631), I 
always get the same error trying to add a printer and to print a test page.
So installed the printer by using the command line as described in the 
CUPS docs, but I can't use it.
The browser displays server-error-service-unavailable
I have this problem with both FreeBSD 4.8 and 5.1.

Please, can anyone help me? 
Thanx

Davide