Hi Steve,
I solved the problem by adding the following property to the java command:
java -Djava.protocol.handler.pkgs=com.sun.net.ssl.internal.www.protocolTestClient
This adds more packages to the search list for protocol handlers.
Hope I could help,
Mischa
P.S. As I created the key with keytool I also did not enter the correct name
of the hostmachine. Keep an eye on that.