Simple Pages Plugin

Greetings,

I'm new to Omeka. I just installed the Simple Pages plugin. No problem creating a page, but when I go to edit the page, I'm not seeing what I'm supposed to be seeing. I made a quick screencast to show you what I mean, as I'm unable to attach an image to this post.
http://www.screencast.com/t/So1CYXeKrp0

That looks like some error is happening when the page loads.

Try turning on error messages.

Thank you for your response, John.
I turned on error page messages.

This is what I'm getting:
Fatal error: Class 'DOMDocument' not found in /var/www/html/omeka/application/libraries/Zend/Xml/Security.php on line 81

Our IT analyst installed Omeka on the server for our library. Is that something he installed incorrectly or is it something that I can do on my end. I have access to the server.
Thanks again.
Alex

More likely that's something the IT analyst will need to do. It indicates that PHP's DOM extension isn't installed on the server. Generally, that's something only an administrator can do.

Thank you, Patrick.
I'll let the IT analyst know.