Thread:Extension talk:ContactPage/How do I enable MediaWiki:Contactpage-text- form-name ?

I used to have the older version without any notable problems, but having made the switch to 2.2 I don't know how to prefill the textarea field with text from "MediaWiki:Contactpage-text-[form-name]". The 'pagetext' and 'subject' pages do not present such problems, so is there an additional setting I might have missed?