Erro durante instalação do J2EE no Kubuntu

root@vegan:/usr/local# ./j2eesdk-1_4_03-linux.bin
Checking available disk space...
Checking Java(TM) 2 Runtime Environment...
Extracting Java(TM) 2 Runtime Environment files...
Extracting installation files...
Launching Java(TM) 2 Runtime Environment...
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

Exception in thread "Thread-2" java.lang.NoClassDefFoundError
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:164)
        at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
        at sun.awt.X11.XToolkit.<clinit>(XToolkit.java:96)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:164)
        at java.awt.Toolkit$2.run(Toolkit.java:821)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:804)
        at java.awt.KeyboardFocusManager.initPeer(KeyboardFocusManager.java:398)
        at java.awt.KeyboardFocusManager.<init>(KeyboardFocusManager.java:394)
        at java.awt.DefaultKeyboardFocusManager.<init>(DefaultKeyboardFocusManager.java:45)
        at java.awt.KeyboardFocusManager.getCurrentKeyboardFocusManager(KeyboardFocusManager.java:164)
        at java.awt.KeyboardFocusManager.getCurrentKeyboardFocusManager(KeyboardFocusManager.java:155)
        at java.awt.Container.clearCurrentFocusCycleRootOnHide(Container.java:3027)
        at java.awt.Component.hide(Component.java:1327)
        at java.awt.Component.show(Component.java:1302)
        at java.awt.Component.setVisible(Component.java:1253)
        at com.sun.wizards.core.IteratorLayout.addSubtree(IteratorLayout.java:479)
        at com.sun.wizards.core.IteratorLayout.addSubtree(IteratorLayout.java:504)
        at com.sun.wizards.core.WizardTreeManager.createSubTree(WizardTreeManager.java:1180)
        at com.sun.wizards.core.WizardTreeManager.createWizardPanel(WizardTreeManager.java:904)
        at com.sun.wizards.core.WizardTreeManager.<init>(WizardTreeManager.java:332)
        at com.sun.wizards.core.CommandLineConsole.run(CommandLineConsole.java:78)
        at java.lang.Thread.run(Thread.java:595)
Deleting temporary files...