Help! Fatal Error on install!

I am trying to install YouBubble on my Joomla 1.7 installation. I have an older version that is already installed, but when I install the newer version, it gives me this error:

Fatal error: Call to a member function get() on a non-object in /home/content/60/9237560/html/templates/yougrids/yjsgcore/yjsg_head.php on line 109

I get the same error when I install the newer version of Yougrids. The older versions work fine. What am I doing wrong or what is wrong with my install that is causing this error? Any help would be appreciated. Thanks!

Are you sure your are posting in product assigned forum?: Yes

What is your CMS version?: Joomla 1.7

MySQL Version: 5.x

PHP version: 5.x

Link to installation: http://www.fuelmyfaith.org

Have you edited any files? If yes tell us which ones.: No

Is this personal or client website?: Personal

Hi,

I see that you managed to install the template ?

Regards

Manos