Problem with Zkoss 5 and implementing an Applet

[Jsupa Hero]

Hello together,
i have that code which works fine in a jsp. but in a zkoss zul page it does not work. i still get the error class not found

  <applet archive="my.jar"
						code="com.applet.myApplet"
						codebase="applets" 
						width="400px">
					</applet>
  

i read all i can get in the web, but nothing helps. has anyone an idea to fix that problem?

[Jsupa Hero]

ok i think there is a problem with the jar archiv.. because when i extract the jar the applet class will be found and it works. so zkoss has a problem with the jar file?