punjab installed and runs, but can not connect to http://mydomain:5280/xmpp-httpbind

I have Punjab installed on Ubuntu, which has apache and is a web server. However, when I launch the page http://mydomain:5280/xmpp-httpbind, I got the following error msg :

" Network Error (tcp_error)
 communication error occurred: "Operation timed out
  The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time."

The twisted.log does not say very much:

 2011-08-12 10:02:33+0200 [-] Log opened.
 2011-08-12 10:02:33+0200 [-] twistd 10.2.0 (/usr/bin/python 2.7.1) starting up.
 2011-08-12 10:02:33+0200 [-] reactor class: twisted.internet.selectreactor.SelectReactor.
 2011-08-12 10:02:33+0200 [-] twisted.web.server.Site starting on 5280
 2011-08-12 10:02:33+0200 [-] Starting factory <twisted.web.server.Site instance at 0x19c0ef0>

The important settings in the punjab.tac file is:

root.put开发者_开发百科Child('http-bind', resource.IResource(bosh))
site  = server.Site(root)
application = service.Application("punjab")
internet.TCPServer(5280, site).setServiceParent(application)

I am sitting behind a company proxy. Is this the reason? Thanks for your kind help!

/Stella

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did you try connecting to http://mydomain:5280/http-bind?