This simulations requires the Microsoft JVM freely available here
http://java-virtual-machine.net/download.html
The simulation requires the Cortona VRML plug-in freely available
here
http://www.parallelgraphics.com/products/cortona/
You will have to disable Suns java virtual machine and enable
the Microsoft plug-in by opening internet explorer click Tools, click the advanced
option, scroll down until you see Java (SUN) virtual machine uncheck the box
next to it. Then check the boxes under Microsoft virtual machine.