Error when printing to remote printer

[Marcelo Magno T. Sales]

Hello all,

I have two machines running Kubuntu 9.04 and there is a Lexmark E230 
laser printer attached to one of them. The printer automatically becomes 
available at the second machine, as expected. However, I can not print 
from it.
The job stays indefinitely "waiting" and the cups server on the machine 
on which the printer is locally attached has error logs like this:

E [27/Sep/2009:01:07:02 -0300] CUPS-Add-Modify-Printer: Unauthorized
E [27/Sep/2009:01:22:18 -0300] encrypt_client: Unable to encrypt 
connection from 192.168.0.1!
E [27/Sep/2009:01:22:18 -0300] encrypt_client: A TLS fatal alert has 
been received.

What am I missing?

Thanks,

Marcelo