Product Preview giving "Connection closed by remote server"

[dubnium]

Trying to add/edit products, however after clicking the product preview button... I get a blank page or "Connection closed by remote server" error. I can edit pricing and attributes but not the main product, so I'm not sure where the problem is.

Zen Cart 1.3.9d
Database Patch Level: 1.3.9d
Database: MySQL 5.0.89-log
PHP Version: 5.2.17 (Zend: 2.2.0)
HTTP Server: Apache/2.2.17

[DrByte]

If you're trying to add words that are commonly associated with hacker activity, such as SELECT or CREATE or DROP TABLE etc, then your hosting company's security systems may be blocking you. You need to contact *them* for help with your problem.

https://www.zen-cart.com/tutorials/index.php?article=63