have you submitted the forum to google, msn, yahoo and all that? so people can find it. you need to get it abit more active .
have you thought about using face book to advertise? dont name it after your self though, give the face book account name 'Randomville' most of my members came from face book when i did this. it will take a while at first but if ya put the time in to advertise it, you will get new members, slowly but surely. Just make sure you go around adding loads of people to you friends list, after a while you wont have to do that no more as you will find loads of people adding you, then tell them about your forum, updates etc, maybe even send Mass PM to them all with the address, a site description and asking for them to join.
in my opinion you get back what you put in when it comes to advertising.
just a thought?!? its upto you