Having a widget problem with wordpress v2.51!!!!!

Hi,

I recently upgraded my wordpress website to 2.51 (note that is is hosted on my own server (hostgator)). I have added a few rss feeds so my content is updated regularly. I have 3 rss feeds working perfectly however my fourth one is not so good. So, i logged into my dashboard and tried to remove it via the edit button however it not shown for the particular widget. All the other widgets work perfectly. I have enclosed some pictures which address the problem.

Please help!!!

Widget Panel :

One the website:

My website link: