Its very hard to get active member and quality posts in a new community forum. Because nobody want to join a new and empty forum .If you want some active member on your forum then you will need attractive content which will attract others to join and participate in your forum. But I think that you can't add quality content daily alone. You will need some help to do this and beside if you will not have some member in your forum then other people will not get any interest in your forum. At this situation you can exchange forum posts with other forum admin/owner.. In this way you will get some member and will also get some post. But for this you will also need to join their forum and will need to make post on their forum.