Regardless of whether or not I call System.setProperty with the
"socksProxyHost" and "socksProxyPort" values, the symptoms are the
same.  If I don't call System.setProperty(...) with those system
property values, then calling System.getProperty(...) for those
property values returns null for both "socksProxyHost" and
"socksProxyPort".

Some additional info:

* Packet-sniffing with Ethereal shows that IE is making Socks v4
connections; the applet is trying to make Socks v5 connections.

* Perusing JVM code, the "java.net.SocksSocketImpl" class has a setV4
method, but nothing in the JVM ever calls it.  Since this works with
Socks v5 servers, but not Socks v4 servers, I suspect this is the
problem.

* The logical thing to do would be to simply call that setV4()
method.  But a class has to be within the "java.net" namespace in
order to do so; the method is not public.  And trying to creating my
own "java.net.*" class results in a SecurityException, even from a
PrivilegedAction.run() method.  I don't believe you can have
"endorsed" classes from within the applet.

Thanks.

John