Building of a new lead producing website

We are a IT company in the Netherlands, we are a fast growing company. We are a specialized system administrator, with a own datacenter. All our customers are coming to us by word-of-mouth marketing. Our company established in 2001, but we never get a new client through our website. Only word-of-mouth. One year ago a company in The Netherlands builds a new website for us. It was a much better then before, and they optimalize it completly for Google search. But still we doesn't get any lead or customer through our website. Do you think, you can build a better website for us? We are the most happy people in the world when our website generate one lead! When a lead comes in via the website, we plan the entire profit of the lead in improving the website stabbing. (and this also leads to the next)