I posted a similar thread a few months ago. At that stage it was only my message board that was up but now the main site is now live too and since then my traffic has increased a lot, however I still have only a few members, but signups are steady and growing. I find that the content on the main site provides quite a lot of traffic from search engines - about 50% of my traffic comes from Google. Perhaps you could get a collection of tips and tricks etc that would attract visitors? Create a site similar to www.TweakXP.com and allow visitors to submit their own tips.

My initial thought were that there must be hundreds of forums out there that are dedicated to tech support - so as a visitor I'm probably more likely to go find one that has many members already, as I have a better chance of getting my question answered there than on a board that is only brand new. However saying that some people like new message boards as tghey can quickly establish themselves as a regular and smaller communities are often a lot nicer and more personal.

What do you envisage for your forum. What direction do you want it to go it? Whu did you get it up in the frst place? Advertising revenue or personal reasons? Try to find something unique to attract members.

Just my 2 cent!
Hope that helps