Using a web browser, go to the page http://www.ece.lehigh.edu/dpm3 and download the document Connecting to VPN and using X windows. You will have to do the steps in this document in order to be able to duplicate the kind of things you that were done in this document.
If you do the steps in the Connecting to VPN and using X windows document, and combine the running the ADS application portions of this document, and things are still not clear, or not working, please contact me at dpm3@lehigh.edu. I can't promise I will fix the problem, but I will definitly give it a shot.