Error occurs when running java web start?

From: Jack zhao (zhaogf0908_at_hotmail.com)
Date: 11/04/03


Date: 4 Nov 2003 03:20:42 -0800

the following is the error message copied from java web start console.
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java.lang.NoSuchMethodError:
sun.awt.windows.WToolkit.getNativeWindowHandleFromComponent(Ljava/awt/Component;)I

        at com.mercury.jadin.utils.WinsunUtils14.internalFindHwnd(WinsunUtils14.java:24)

        at com.mercury.jadin.utils.PDUtils.findHwnd(PDUtils.java:44)

        at com.mercury.jadin.utils.Utils.isMaximized(Utils.java:1455)

        at abstr.Java2C.resetWindowState(Java2C.java:1378)

        at abstr.Java2C.addWindow(Java2C.java:1330)

        at abstr.Java2C.addWindow(Java2C.java:1301)

        at mercury.awt.cs.WindowCS.windowActivated(WindowCS.java:177)

        at java.awt.AWTEventMulticaster.windowActivated(AWTEventMulticaster.java:328)

        at java.awt.Window.processWindowEvent(Window.java:1119)

        at javax.swing.JFrame.processWindowEvent(JFrame.java:266)

        at java.awt.Window.processEvent(Window.java:1066)

        at java.awt.Component.dispatchEventImpl(Component.java:3639)

        at java.awt.Container.dispatchEventImpl(Container.java:1623)

        at java.awt.Window.dispatchEventImpl(Window.java:1590)

        at java.awt.Component.dispatchEvent(Component.java:3480)

        at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1708)

        at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:734)

        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:340)

        at java.awt.Component.dispatchEventImpl(Component.java:3509)

        at java.awt.Container.dispatchEventImpl(Container.java:1623)

        at java.awt.Window.dispatchEventImpl(Window.java:1590)

        at java.awt.Component.dispatchEvent(Component.java:3480)

        at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)

        at java.awt.SentEvent.dispatch(SentEvent.java:50)

        at java.awt.DefaultKeyboardFocusManager$DefaultKeyboardFocusManagerSentEvent.dispatch(DefaultKeyboardFocusManager.java:143)

        at java.awt.DefaultKeyboardFocusManager.sendMessage(DefaultKeyboardFocusManager.java:169)

        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:245)

        at java.awt.Component.dispatchEventImpl(Component.java:3509)

        at java.awt.Container.dispatchEventImpl(Container.java:1623)

        at java.awt.Window.dispatchEventImpl(Window.java:1590)

        at java.awt.Component.dispatchEvent(Component.java:3480)

        at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)

        at java.awt.SequencedEvent.dispatch(SequencedEvent.java:93)

        at java.awt.EventQueue.dispatchEvent(EventQueue.java:448)

        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)

        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)

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who can tell me the reason? and what do i do to avoid this peoblem?
thanks in advance.