Installation issues

I am getting the following error after isntalling.
I am trying to display the widget as floating.

Invalid App Id: Must be a number or numeric string representing the application id. all.js:56
The "fb-root" div has not been created, auto-creating all.js:56
FB.getLoginStatus() called before calling FB.init().

I am actually not getting anything displayed at all.

Using Version 5.3.6 of Digg Digg and WordPress 3.6

Please help me in the installation of the same. Thanks.

http://ww.wp.xz.cn/plugins/digg-digg/