For general wikipost requirements/questions, try this master thread over Technical Support Forum:

WikiPost problems

If it's about a specific thread in any given forum, I would think to contact forum mods should give you some more definitive answers. FWIW, some wikiposts are set up in a way only MODs can edit/contribute to.

ps. This is the TB thread how wikiposts were implemented on FT: http://www.flyertalk.com/forum/talkb...flyertalk.html