Ultramixer does not start install on my Mandriva Spring 2007

Ultramixer does not start installation on my Mandriva System. I geht this when I start:
java -jar UltraMixer-2.0.13-linux.jar

  • ERROR -
    java.lang.ClassNotFoundException: net.sourceforge.mlf.metouia.MetouiaLookAndFeel
    java.lang.ClassNotFoundException: net.sourceforge.mlf.metouia.MetouiaLookAndFeel
    at java.lang.Class.forName(libgcj.so.7)
    at java.lang.Class.forName(libgcj.so.7)
    at javax.swing.UIManager.setLookAndFeel(libgcj.so.7)
    at com.izforge.izpack.installer.GUIInstaller.loadLookAndFeel(GUIInstaller.java:380)
    at com.izforge.izpack.installer.GUIInstaller.(GUIInstaller.java:119)
    at java.lang.Class.newInstance(libgcj.so.7)
    at com.izforge.izpack.installer.Installer.main(Installer.java:62)

You need the official SUN JRE instead of the GCJ java to install UltraMixer. Please search the forum for more information…

I had the same problem until I ran it as root (or sudo).