cups admin problem with Ubuntu

[James Kramer]

Would someone please suggest solutions to setting up my cups server in
Ubuntu.  I am running Dapper Dan on my laptop and would like to access
my network printer connected to my ASUS router.  I can not set up my
network printer.  I tried to do it using the web based administrator
http://localhost:631
It will not let me do this.  I appears to me the problem is that I
don't have root access since Ubuntu does not enable it.  I previously
had no problems connecting the laptop using Debian.  I tried
everything that I can think to get this thing to run.  I have even
reloaded the drivers out of desperation.  The problem is that the
administrator won't let me modify the printer.  I modified the file
/usr/local/brother/cupswrapper/cupwrapper-MFC7820N
to use a network printer rather than usb by adding line:
lpadmin -p MFC7820N -E -v socket:192.168.1.5 -m brmfc7820n_cups.ppd

The system is still trying to access the USB port
Here is my error_log after attempting to modify the printer using the
web administrator:

E [04/Jul/2006:07:18:16 -0400] [Job 2] Unable to open USB device
"usb:/dev/usb/lp0": Success
E [04/Jul/2006:07:20:30 -0400] CUPS-Add-Modify-Printer: Unauthorized
E [04/Jul/2006:07:20:45 -0400] cupsdAuthorize: pam_authenticate()
returned 7 (Authentication failure)!
E [04/Jul/2006:07:20:46 -0400] CUPS-Add-Modify-Printer: Unauthorized

Thanks in advance for advice.
Jay