I resolved this issue a long time ago, but thought I'd provide additional info to close out the thread. I found some rendering errors in the JBoss log. I'm not entirely sure why it was failing, but I think it was related to my laptop being reassigned a new IP Address once I connected to a new network. Restarting JBoss resolved the issue. It would have been helpful if the Flex UI had presented an error message of some sort.
In any case if a user would like to know more information from Flex UI, It does provide some useful debug information.
Just click on the Flex area on left hand side and click Ctrl + Alt + D , a flex dialog box opens up with useful information
Europe, Middle East and Africa