forum deleted threads that havent been active for a certain time

Threads don't get deleted unless you had curse words or were just plain getting down on someone, they do get archived after a year if they are not active, you can bring them up again in a forum search.

You need to give more information...such as what was the title of the post and where did you post it and when, more details are necessary if one of the moderators can answer you.

It is possible that you posted in two different forums and one of the moderators deleted one of them or moved your post to the appropriate forum but they usually tell you first and give you some time to reply.

This the one your looking for? Linky

If it is, change your show amount to last 30 days and it will show up.