It seems to me like you downloaded a package without eZ Components included, which are required for normal functioning of eZ Publish (packages without eZ Components are provided because eZ Publish can use the ones installed system wide too)
You can fix it by downloading this package: http://share.ez.no/content/download/103523/477755/version/1/file/ezpublishcommunity-4.4.0-with_ezc-gpl.zip
Extract it and copy the lib/ezc folder from the downloaded package to your existing lib folder and regenerate the autoload array.