I have just installed Ubuntu 15.04. I tried to connect with my broadband DSL connection. When I entered the cable it was showing that it could recognize the cable. Then from edit connection I added a new DSL Network Connection and configured with my username and password. Then when I tried to connect through the new configured DSL connection it prompts up a message saying "Connection activation failed. (1) Creating object for path '/org/freedesktop/NetworkManager/ActiveConnection/5' failed in libnm-glib.". Here is the screenshot of the prompt: http://pasteboard.co/3HlwTSl.png
What is the problem? How do I resolve it?