Exception in thread "AWT-EventQueue-2" java.lang.IllegalArgumentException: origin not in parent's hi

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I have a java applet running well until IE7 came up.

If user upgrade broswer to IE7 then the error comes in Java Console.

Exception in thread "AWT-EventQueue-2"
java.lang.IllegalArgumentException: origin not in parent's hierarchy
at java.awt.PopupMenu.show(Unknown Source)
at MenuPanel.update(MenuPanel.java:131)
at MenuPanel.paint(MenuPanel.java:102)
at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
at java.awt.Container.paint(Unknown Source)
at java.awt.Container.update(Unknown Source)
at sun.awt.RepaintArea.updateComponent(Unknown Source)
at sun.awt.RepaintArea.paint(Unknown Source)
at sun.awt.windows.WComponentPeer.handleEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown
Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown
Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)


Here is a part of code for the Applet:

PopupMenu popList[];
Label lblList[];

public void update(Graphics g)
{
Rectangle rect = getBounds();
g.setColor(clrDefault);

g.fillRect(0, 0, rect.width, rect.height);
g.draw3DRect(rect.x+3,rect.y+3, 2,rect.height-9, true);
g.draw3DRect(rect.x+6,rect.y+3, 2,rect.height-9, true);

for (int i = 0; i < lblList.length; i++)
{
rect = lblList.getBounds();
if (i == idxHighlight)
g.draw3DRect(rect.x-1,rect.y-1, rect.width+2,rect.height+2, true);
if (i == idxPressed)
{

g.draw3DRect(rect.x-1,rect.y-1, rect.width+2,rect.height+2, false);

if (bMenuUp == false)
{
bMenuUp = true;
if (bolDisplayImage && imageX > 0) {
g.drawImage(imageLine, imageX, imageY+2, this);
g.drawImage(imageSetup1, imageX+10, imageY, this);
}
popList.show(this, rect.x, rect.y+rect.height+1);
}
}
}

if (bolDisplayImage) {
imageX = rect.x + rect.width+2;
imageY = rect.y;
g.drawImage(imageLine, imageX, imageY+2, this);
if (bolOnMouseOver) {
g.drawImage(imageSetup2, imageX+10, imageY, this);
setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
} else {
g.drawImage(imageSetup1, imageX+10, imageY, this);
setCursor(Cursor.getDefaultCursor());
}
}
}


someone please help?

Thanks