If you are looking for rights to post on the job board, that would have to be done by the forum owner, JacobJ. He started the first 2 threads on the job board. If you click on his name, you can send him a PM.
You should be able to just go to the Job Board and post jobs. What kind of problem are you having? You have posted jobs on the Job Board several times before. Are you now unable to post there?