[Xprint] Using kprinter as spooler command

[rboyer]

Hello!

I started using Xprint with Firefox a few weeks ago. There is one page
on the web that I could not print without using Xprint. I wonder now if
it would be possible to use kprinter as the spooler command. I tried the
following (as a user, not as root) but without success:
*xp-spooler-command: /usr/local/kde/bin/kprinter --display=:0

Error messages were:
Xlib: connection to ":0.0" refused by server
Xlib: no protocol specified
kprinter: cannot connect to X server

Thanks in advance for any help or suggestions.