You have to guess if it wants the root login or the authorized user login, presuming you authorized a user, and it does not always accept the root login during a non-root session so you have to logout of slitaz as the non-root user and login to slitaz as a root user session.

Cups is not my favorite program.

addgroup tux lp
addgroup root lp

Thank you slicel and kultex, by logging back in as root, I was able to get into CUPS and install the printer. It prints successfully from CUPS and from Open Office, but Abiword doesn't recognize the printer. Are there any Abiword experts on the forum?

Thanks again! I found a used HP LJ 2420DN for $100, it's fast and through our little home network is accessable from both laptops and all my experimental Linux and BSD machines, and I'm pretty happy right now, just a couple of minor things left like Abiword.

Start abiword from terminal.

tux@slitaz: abiword

Try to print a document
Copy/paste relevant error messages from terminal in your reply

Hey, I'm having a similar problem, but I can't add a printer even from root. Anyone know why that would happen?

I do not know exactly where your error is but you can try installing aspell, rebooting, and starting cupsd.

http://forum.slitaz.org/index.php/discussion/41/printing-how-to