How can I get permission to post in the Freeware Subforum?

I am working on a freeware map for T:ANE (The Metra Milwaukee District North Line Project) and I want to post about it in the correct subforum, the "Freeware" forum. However, I cannot post in it. How can I obtain permission to post in the freeware subforum?

Apparently something went wrong during the creation of your account or the registration of your game, as you should have access to that forum already.

To fix this problem:
Please send a ticket to the Helpdesk. See link at the top of this page.