Wireshark-users: [Wireshark-users] after install

From: "fred jonkman" <jonfre@xxxxxxxxx>
Date: Thu, 5 Jul 2007 10:07:29 +0200

working on OSx  i installed wireshark using MacPorts

when i try to run WireShark, terminal give me the message

(wireshark:18697): Gtk-WARNING **: cannot open display:


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Extra info

This is a part of the instalation log

Fetching gtk2
--->  Attempting to fetch gtk+-2.10.13.tar.bz2 from
http://mandril.creatis.insa-lyon.fr/linux/gnome.org/sources/gtk+/2.10
--->  Verifying checksum(s) for gtk2
--->  Extracting gtk2
--->  Configuring gtk2
--->  Building gtk2 with target all
--->  Staging gtk2 into destroot
--->  Installing gtk2 2.10.13_0
--->  Activating gtk2 2.10.13_0
--->  Cleaning gtk2

What did i wrong ???