Short time connection

[smart2]

Hello,

I installed Deluged and Deluge-webui on Ubuntu server 14.04. I used this tutorial.
I can connect, but only shortly after server restart. The connection time is not so long 10-20 sec and then I lose the connection.
It happens with the WebUI and with the Deluge GTK... my log files are empty.

Thank you for your help in advance!

[smart2]

I've started more then ones from scratch, but get always the same.
I can connect for the first time (till 30sec from start) over the Web and if I don't refresh the browser I can manage my torrents but after refresh/F5 I cant reconnect to Web UI.
Any Ideas?