Signup page returning an error on the Directory Plugin

Hello friends.

I really hope to get this up and running ASAP so I can just let it take off and be wildly successful.

In the meantime, I have run into this following error:

Fatal error: ob_start() [ref.outcontrol]: Cannot use output buffering in output buffering display handlers in /home/janste16/ on line 851

This error shows up when I click on the signup page for my Directory plugin. The url is:

It may be an easy fix… but for a non-technical geek such as myself, this is a foreign language.

Thanks in advance!