Ethereal-users: [Ethereal-users] Problem running ethereal

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From: Liam Whalen <lwhalen@xxxxxxxxxxxxx>
Date: Sun, 6 Jul 2003 23:24:26 -0400 (EDT)
I have downloaded and built ethereal 0.9.13 but whenever I try to run it I
get this error

bash-2.04# ./ethereal
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified


Gtk-WARNING **: cannot open display: :0.0

I am running Slackware linux kernel 2.4.21 with XFree86 version 4.2.0

What is causing this problem?
Liam