How to start a discussion in a sub-forum?

[Brett Pirie]

I'm sure this is a very basic question, but I just can't figure out how to start a discussion in a sub-forum.  I'd like to start a new discussion in the Upstate New York Real Estate Forum, but it is not an option in the "Pick a Forum Category" drop down menu and neither are any of the other sub forums for other states.  Obviously I have the brain power to figure out how to start a discussion in places like this forum, but how are people getting discussions started in the sub-forums?