Cups printing problem

[Robert Jerrard <rjerrard@math.concordia.ab.ca>]

I have just installed Debian etch from scratch. In attempting to set up
the printing the cups printer section tells me:

"/usr/lib/cups/backend/http failed"

and /var/log/cups/error_log gives:

E [01/Sep/2007:10:22:33 -0600] [Job 1] Destination printer does not
exist!
E [01/Sep/2007:10:22:33 -0600] PID 27798 (/usr/lib/cups/backend/http)
stopped with status 4!
p

when using http://localhost:631/ipp/9100

If I try socket://localhost:9100 cups tells me:

"Network host 'localhost' is busy; will retry in 5 seconds..."

and /var/log/cups/error_log gives:

E [01/Sep/2007:11:40:59 -0600] CUPS-Add-Modify-Printer: Unauthorized

Any ideas what to try next to get printing to work?

Bob Jerrard