Gnutella Forums - Instalar LimeWire [ Kubuntu ]

Buenas antes ke todo, soy user de hace mucho, pero por windows, ahora instale trato de instalar desde un mes el soft en Kubuntu y nosé porke no me funciona, me baje el .rpm, lo convertí a .deb por mí distro luego lo pase a la carpeta Lime y le instale, ahora trato de ejecurtalo y me da el siguiente error

root@Scream:/usr/Lime# limewire
Starting LimeWire...
Java exec found in PATH. Verifying...
OOPS, you don't seem to have a valid JRE. LimeWire works best with Sun JRE available at http://www.java.com
Java exec found in /usr/lib/j2re1.5-sun/bin/
Suitable java version found [/usr/lib/j2re1.5-sun/bin/java = 1.5.0_07]
Configuring environment...
Loading LimeWire:
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.
at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
at sun.awt.X11GraphicsEnvironment.access$000(Unknown Source)
at sun.awt.X11GraphicsEnvironment$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.awt.X11GraphicsEnvironment.<clinit>(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvir onment(Unknown Source)
at sun.awt.X11.XToolkit.<clinit>(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at java.awt.Toolkit$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.getDefaultToolkit(Unknown Source)
at com.limegroup.gnutella.gui.Main.showInitialSplash( Main.java:67)
at com.limegroup.gnutella.gui.Main.main(Main.java:39)

************************************************** ****************
Something went wrong with LimeWire.
Maybe you're using the wrong version of Java?
(LimeWire is tested against and works best with with Sun's JRE, Java 1.4+)
The version of Java in your PATH is:
java version "1.4.2"
gij (GNU libgcj) version 4.1.0 (Ubuntu 4.1.0-1ubuntu8)

Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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