Maybe the problem is like the seo-guy describes in in the article about blue widgets and green widgets.

I looked at the site and it looks fine to me. Perhaps your SEO techniques attracts the wrong type of visitors, so even though your message is right, it's possible that it's not what they are looking for. I think that just need to find the right type of visitors.

I also looked at the "contact us" page. Do you track how many people who actually view that page? I think that many people find it intimidating with a contact form that asks for so much personal information. I typically have a problems just trying to get people's real email address.

I wish I could be more helpful.