Kune

hi,
I have fresh debian instalation, kune behind NGINX reverse proxy installed on the same host.

The configuration of nginx is:
server {

listen   192.168.2.13:80; ## listen for ipv4

server_name  kune.mynet
        access_log  /var/log/nginx/kune.mynet-access.log;

location / {
                proxy_pass  http://localhost;
                proxy_next_upstream error timeout invalid_header http_500 http_502 http_503;

proxy_set_header Host $host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

proxy_set_header X-Forwarded-Proto http;

proxy_redirect     off;
        }
}
        upstream localhost  {
        server 127.0.0.1:8888;
}

I have still the "connecting" sign at the top of the page, I looked up to the jscript console, and there is:

Failed to load resource: the server responded with a status of 500
(Socket opening: localhost:5280 >> java.net.ConnectException: Connection
refused) http://kune.mynet/http-bind/

Failed to load resource: the server responded with a status of 500
(Socket opening: localhost:5280 >> java.net.ConnectException: Connection
refused) http://kune.mynet/http-bind/

Failed to load resource: the server responded with a status of 500
(Socket opening: localhost:5280 >> java.net.ConnectException: Connection
refused) http://kune.mynet/http-bind/

Failed to load resource: the server responded with a status of 500
(Socket opening: localhost:5280 >> java.net.ConnectException: Connection
refused) http://kune.mynet/http-bind/

...

when I'm trying to access /http-bind/ (as defined in kune.properties as kune.chat.httpbase = /http-bind/), I've got an error 500. The same error I've got, when I'm trying to access the page directly on the server - lynx http://localhost:8888/http-bind/ - the error is not from the nginx reverse proxy, but directly from kune.

Please tell me what's wrong, or what do you need to know to diagnose the problem.
Thanks in advance
O.Pachner, Prague, Czech Republic