package com.sun.net.ssl.internal.ssl does not exist

Although it used to work, when I try to use an SSL provider like

Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());

I keep getting this exception when attempting to compile my SSLClient1 class
SSLClient1.java:28: package com.sun.net.ssl.internal.ssl does not exist

I remember it working with version 1.2. We are now running V5R2 and I have the 
version set to 1.4 in the system properties file.
I thought I read somewhere that this provider had changed (or some such thing) 
with later releases but I can't find it.

Peter


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