AWT: TopLevelSetFocusableWindowParentChildDisable fail

JDK : JDK 1.4.2_19b09
Platforms[s] : x86 - Windows VIsta - jvm32
testbase : /net/vice.russia.sun.com/export/home0/dtf/dtf_ws/suites/142_Suites/awt

TopLevelSetFocusableWindowParentChildDisable FAIL

This test passed on 1.4.2fcs - 1.4.2_13b06
and fail on 1.4.2_17b04-1.4.2_19b09
Regression occured between 1.4.2_13 - 1.4.2_17

error log:
Exception arised
java.lang.reflect.InvocationTargetException
at java.awt.EventQueue.invokeAndWait(EventQueue.java:864)
at TopLevelSetFocusableWindowParentChildDisable.<init>(TopLevelSetFocusableWindowParentChildDisable.java:26)
at TopLevelSetFocusableWindowParentChildDisable.main(TopLevelSetFocusableWindowParentChildDisable.java:219)
Caused by: java.lang.NoClassDefFoundError: TopLevelSetFocusableWindowParentChildDisable$ButtonActionListenerImplClass
at TopLevelSetFocusableWindowParentChildDisable$1.run(TopLevelSetFocusableWindowParentChildDisable.java:30)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:179)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:478)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
at java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:1507)
at java.awt.Component.getLocationOnScreen(Component.java:1481)
at TopLevelSetFocusableWindowParentChildDisable.clickDummyButtons(TopLevelSetFocusableWindowParentChildDisable.java:163)
at TopLevelSetFocusableWindowParentChildDisable.doTest(TopLevelSetFocusableWindowParentChildDisable.java:58)
at TopLevelSetFocusableWindowParentChildDisable.main(TopLevelSetFocusableWindowParentChildDisable.java:219)
Test failed!

Results dir:

http://stt-13.russia/results/1.4.2_19/b09_j4b/awt/winvista-enterprise-i586/run1/winvista-enterprise-i586/awt_stt_suites_winvista-enterprise-i586/root.Windows_Vista.x86/TopLevelSetFocusableWindowParentChildDisable/