Have a problem with blank pages from product & category links

I just did a fresh install of Zen-Cart through my host hostmonster, and I uploaded a new template. The template consists of very basis changes to css and standard changes to header.php, meta tags.php, etc. When I click on a category I get a blank page and viewing source code shows blank also. If I click on the new product box it show up fine. Here is the address that is shown when i get the blank page. I really need some help with this one!

http://discountprintingservice.com/index.php?main_page=index&cPath=1

Thanks,
GoldBuckle

Searching the FAQ area for "blank page" brings up this article and diagnostic tool: https://www.zen-cart.com/tutorials/index.php?article=82

ok, i tried switching back to the default template and it works fine, but when I go back it doesn't. so i deleted by css to a blank file and it still does the same thing so i know it is not the css file and I have looked over the files below and don't see anything obvious. the only files I changed besides css was

english.php
header.php
index.php
meta_tags.php

and the changes I made were standard, like tagline, header image, etc. nothing out of the ordinary

You've probably made a typo or created a PHP error when editing one of your language files. The debug tool I mentioned earlier will tell you exactly where.