I am new to Citrix XenApp and am implementing this for the first time. This is just for a demo server, so I'm not concerned about security right now. I'm just trying to get it to work. I have XenApp, and licensing installed on the same server. I have a web interface published and one application published. I have an alternate address set. I can hit the web interface both from the local server as well as externally. However, when I try to launch the application, it launches the client, says it has contacted the server, but that's it, it never gets any further. I have changed to use the Alternate address and get the same result from outside our firewall. It seems to connect but simply doesn't go any further after "contacted server". Any ideas?