Thread:Project:Support desk/Encountering error creating extension

I have a test wiki at http://testwiki.net63.net/. I am attempting to create a new extension called PullThePlug, but while using the tutorial at Manual:Special Pages, I stumbled across this error: PHP Error Message

Fatal error: Class 'PullThePlug' not found in /home/a6801473/public_html/wiki/includes/SpecialPageFactory.php on line 326 I followed the tutorial almost exactly, substituting PullThePlug for MyExtension. I am putting my entire wiki up for download: https://www.dropbox.com/sh/m2sdzqf46228eo3/w0Km-9n4VB