You need to set the proper permissions on the /dev/lp0
Try this
Code:
$ chmod 666 /dev/lp0
Try and print something with this command
Code:
# cat /etc/fstab > /dev/lp0
That should print something for you on the printer in raw mode
Now, restart cups with this command
Code:
$ /etc/rc.d/rc.cups restart
localhost:631 in Konqueror should show the parallel port now.