howto get popup for connection speed

["hacker (of golf)" <golfbuf@gmail.com>]

I'm trying to create a popup to show the connection speed.

I'm trying this:

root :~# kdialog --display localhost:0 --msgbox "Connection Speed
`tail -n1 /var/log/ppp-connect-errors | awk '{ print $6 }'` bps"
kdialog: cannot connect to X server localhost:0

but, as you can see, it won't connect to the xserver.

How can I get this to work?