This evening I found the trick to reenable the dynamic DNS in the Linksys WRV54G VPN router. Free to accomplish this troublesome task you will first have to open up the Web and admin interface of the router and download the current running configuration, open that file in Notepad and delete all references to dynamic DNS that you find: pay attention to the brackets. After you delete all of these entries save the configuration file in Notepad and then load the saved configuration in to the router. After the load is complete you will be able to go back to dynamic DNS a reconfigure it and have it be enabled. If it switches back to being disabled you have to rerun through the steps previously mentioned.