No connection to WebSocket

[arsenij-solovjev]

Using JBoss-7.2, I configured the server as described in the README, as well as copypasted the code from the WebServlet example in the README.
Further I wrote an Html which works against other web socket servers.

When I tried to reach the Servlet per URL :8080//websocket the server returned a 405, saying that it doesn't support GET. However trying to talk to it as a web socket yields no reaction.

Do you have an idea why this might be the case? Against which revisions of jboss-as has this been tested?

(Edit: I tried this with JBoss-7.1.3 and it didn't work either :/ )