Not able to connect to the Internet

[anil]

I previously used to use Ubuntu 10.10.
Whenever I was not able to connect to the Internet, it used to show a window which asks for username & password for DSL authentication.

Now I am using Ubuntu 11.04.
Now if the above scenario occurs, the same window gets popped up but it does not ask for any authentication. So I am not able to connect to the Internet.
There are only 2 buttons - "Cancel" & "OK" which is disabled.
I have attached screenshot of the problem for refence.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/999674/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]