The only idea I have on this one is that the java games being played are using the MS version of java (aka, not proper java).
The only thing to try is see if MSjVM (MS java vm) will work. Here is a link to the msjvm download
http://www.ivtweb.com/jvm/
and here is a link for the tool to remove it
http://www.softpedia.com/public/cat/13/7/13-7-127.shtml