With plugin2 Printing is not working.

I tried printing clock appet ( http://java.sun.com/products/plugin/1.5.0/demos/plugin/applets/Clock/example1.html ) and couple of other applets.
With Firefox3.05 I am getting a black box in applet space where as with IE6/7 blank page is coming.

I am getting the followint Exception while click print on IE and Firefox 3 beta 5
java.lang.ClassNotFoundException: sun/plugin2/main/client/WPluginEmbeddedFrame
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sun.plugin2.main.client.ClientPrintHelper.print(Unknown Source)
at sun.plugin2.main.client.PluginMain$3.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(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)