Web site problems

[Andesine]

Hi I've been trying to purchase an upgrade from an old version of Poco Mail to Barca. It won't accept my licence code so I tried the contact page which doesn't work, then went through support and clicked on a link there and got a Zend error.

Here's your error message:

The component "Zend Optimizer" is not installed on the Web Server and therefore cannot service encoded files. Please download and install the Zend Optimizer (available without charge) on the Web Server.