Have you either configured an Exception Site List or deployed a Java Deployment Rule Set? Setting the RMI property will allow applets to make RMI connections to the Windchill server. However, that property only matters if the applet is allowed to load. Oracle has added new security controls to Java 7/8 that will block any unsigned applet (i.e. Windchill applets) from loading. Exception Site Lists and Deployment Rule Sets are two methods that can be used to get around these security controls and allow Windchill applets to load. See CS142095 for information about these security controls as well as information about setting up Exception Site Lists and Deployment Rule Sets.
