If you look in the browser console, you will see errors:
TWITTER WIDGET: The Twitter API v1.0 is deprecated, and this widget has ceased functioning. widget.js:1
TWITTER WIDGET: You can replace it with a new, upgraded widget from <https://twitter.com/settings/widgets/new/user?screen_name=ranganh> widget.js:1
TWITTER WIDGET: For more information on alternative Twitter tools, see <https://dev.twitter.com/docs/twitter-for-websites> widget.js:1
This means Twitter.Helper use old and deprecated Twitter API and should be modified to conform API changes. You could make it manually in file: MvcApplicationProject\App_Code\TwitterGoodies.cshtml