The server appears in the list but you can't click on the + and expand it out to see what it contains.
Check in your server list that can actually see the server. Also keep in mind that this software needs access to the admin port, not the normal web one, although it looks like your tunnel is correct for that.
You also need to turn on remote administration and set up the username and password etc. Try pointing a web browser to your localhost 6122 and check you can log in to the admin panel if that does not work try the blog of
Error code 0xc00000e9 that may help you.