I am trying to Jar my client which it works fine however I am using Theme.jar and i get this error when running thr jar

Code:
java.lang.ClassNotFoundException: org.jvnet.substance.skin.SubstanceRavenLookAnd
Feel
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at javax.swing.SwingUtilities.loadSystemClass(Unknown Source)
        at javax.swing.UIManager.setLookAndFeel(Unknown Source)
        at Gui.initUI(Gui.java:76)
        at Gui.<init>(Gui.java:53)
        at Gui.main(Gui.java:35)
It gives me the error on this line

Code:
UIManager.setLookAndFeel("org.jvnet.substance.skin.SubstanceRavenLookAndFeel");
And I am not to sure on how to get it to work I have tried including jar files in my main client jar as well as just putting it in the dir with the client jar file. Still no go. Removing it allows it to work

Thanks,
Chach

Edit: Fixed cache issue