NullPointerException at Startup on Windows XP

When I start Oxygen XML Developer on Windows XP I get the following error. What can I do?

Cannot start 
        
        
        
        
        Oxygen XML Developer
        
        
        
        
      .
Due to:java.lang.NullPointerException
java.lang.NullPointerException
at com.sun.java.swing.plaf.windows.XPStyle.getString(Unknown Source)
at com.sun.java.swing.plaf.windows.XPStyle.getString(Unknown Source)
at com.sun.java.swing.plaf.windows.XPStyle.getDimension(Unknown Source)
at com.sun.java.swing.plaf.windows.WindowsProgressBarUI.
getPreferredInnerHorizontal(Unknown Source)

The error is caused by a a bug in the Java runtime from Sun Microsystems. You can avoid it by setting the Java system property com.oxygenxml.no.xp.theme to the value true in the startup script, that is adding the startup parameter -Dcom.oxygenxml.no.xp.theme=true. If you start Oxygen XML Developer with the oxygenDeveloper.bat script just add the parameter-Dcom.oxygenxml.no.xp.theme=true to the java command in the script. If you start Oxygen XML Developer from the Start menu shortcut you have to add the same parameter on a new line in the file [oXygen-install-folder]\oxygenDeveloper.vmoptions .