Java Applet cann't be loaded in IE5.0, how come?

When I open Internet Explorer(5.0) in my Windows2000 OS, and open a html page,it says "Exception:java.lang.ClassNotFoundException::ChatRoom.ChatRoomApplet.class".
I've downloaded and installed the java SDK1.4.0_02.
Any help?
thks.

Probably the chatroom is full???
OK, seriously, the chat applet probably was compiled to run with the (old) MS java virtual machine and won't run with any of the current jvm's - there could be a number of reasons.
Go to IE menu: Tools>Internet Options>Advanced and scroll down to Java (Sun) and uncheck it, and check the next box: Microsoft VM/Java console enabled. Close all IE windows. Try the chatroom.
This returns control of IE java to the MS jvm; it won't run newer applets; change back to Sun to run those.
Repost if you still have problems.

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