Thread not appearing

Does anyone know why a new thread I just posted wouldn’t be appearing?

I posted it to the Advertising Network forum. I tried to repost it, and got a message saying ‘this is a duplicate thread’ and it told me I couldn’t post it again within 5 minutes, so I waited 5 minutes and posted it again (in case something had gone wrong the first time) and the same thing happened - it said it’s posted, but I can’t see it anywhere.

What could be the problem?

Thanks all