Protocol Handler in the applet

Hi.
I 've created a new protocol handler. It's working fine in the application but doesn't work in the applet.
The Handler class is in the package - protocol.xxx
It's registered -
System.getProperties().put("java.protocol.handler.pkgs", "protocol");
However xxx:// is unknown protocol in the applet
Any ideas?
Thanks.

OK, that's why I phrased it as a question. I'm sorry, I'm afraid I'm clueless on this one.

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