EzStatic: Fatal Error

EzStatic seemed to be working fine for me. Now something is amiss. When I attempt to load my faq page, (bullfaq.php), I get the following error:

“Fatal error: Call to undefined function: ob_get_content() in /home/omar/public_html/bullspeak/wp-content/plugins/ezstatic.php on line 217”

My link to the faq page looks like this:

“<b>HERE</b>“

I’m certain the error is mine, but where???