swing support in kaffe

now I meet the question under mentioning...i use the kaffe(1.1.7)under 
the redhat 9 ..and useage:  kaffe -Xkaffe-xlib-awt ap;
the error is following: 
java.lang.NoSuchMethodError: 
java/awt/Toolkit.addAWTEventListener(Ljava/awt/event/AWTEventListener;J)V
   at javax.swing.JPanel.updateUI (JPanel.java:128)
   at javax.swing.JPanel.<init> (JPanel.java:108)
   at javax.swing.JPanel.<init> (JPanel.java:85)
   at javax.swing.JRootPane.createGlassPane (JRootPane.java:563)
   at javax.swing.JRootPane.getGlassPane (JRootPane.java:474)
   at javax.swing.JRootPane.<init> (JRootPane.java:526)
   at javax.swing.JFrame.createRootPane (JFrame.java:219)
   at javax.swing.JFrame.getRootPane (JFrame.java:204)
   at javax.swing.JFrame.frameInit (JFrame.java:152)
   at javax.swing.JFrame.<init> (JFrame.java:114)
   at ErsBlocksGame.<init> (ErsBlocksGame.java:90)
   at ErsBlocksGame.main (ErsBlocksGame.java:540)
   at java.lang.reflect.Method.invoke0 (Method.java)
   at java.lang.reflect.Method.invoke (Method.java:255)
   at org.kaffe.jar.ExecJarName.main (ExecJarName.java:64)
   at org.kaffe.jar.ExecJar.main (ExecJar.java:57)

so I want you help me,,,give me some ideas .....could you help me
...thanks a

lots