Hi Richard, I have personally seen this many times in many different forms. It is usually how your browser / computer handles Java. The router does work fine for IE 9, but, there are instances when it won't work for a person because of some setting within the browser or not having everything fully updated.
For the IE if you can't make it work for your life, you can use the compatability view. Mozilla Firefox is usually a very solid alternative to IE. It handles all of our product Java much better and really I'm not sure I've ever seen Mozilla not work.
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