The Category lit doesn't appear in the forum category widget!

Hi,

I am using Mesocolumn theme as it claims it is bbPress compatible.

I am having issues with the forum category widget. I have defined 4 categories but none appears in the widget.

Also, how do I add first-time bbPress registration to my forum page.

The link to my site is : http://www.ckingsensors.com/ckingforums/

I am using WP 4.1 and the latest bbPress version.

Any help would greatly be appreciated.

Thanks,
Jay