Troubleshooting PHP search

[MTBMaster]

I am having problems getting the PHP Zoom search to work on my website. When I conduct a search, I get a blank screen. I have confirmed that PHP runs on my server (5.1.6). What else should I be looking at?

Here is an obscure version of my search:
http://service.specialized.com/search/search.php

Any comments appreciated.

[David]

Might be the problem detailed in this older post,

PHP / CGI script returns no results on Apache RLimitMEM & RLimitCPU