Drycarpet
Here my suggestions, it looks like you sell a great product and your customers that are posting are most GREAT testamonals for your product.
I think you need a bunch more topics and you current forum topics are way to business like, how about some topics like
DRYCARPET, did it work for you ???
Tell us about your stains ?
DRYCARPET tips
Other household cleaning tip, secrets & solutions
also put a forum on there for small talk or chit chat, because right now if they are not talking about your products, there is really not a place to post.
To me these topics sound alot more inviting and will probally get more people posting.
How about a monthly contest, where the winner with the best tip (or whatever)posted on your board, gets a free bottle of your newest product.