I dont know , for some reason everyone else liked the design but i will give my honest opinion. It doesn't engage me ( the site) , sorry if you don't like my opinion.
Once i enter the site, i fell like i am not in a professional site , the buttons aren't working ( not talking about links , the way they are setup its not nice ). A company like yours should always have a logo. In my opinion a logo is the must for businesses , if your site is to have a header with a logo , a regular menu bar instead of buttons like that it would be much better.
As for the setup of the site, rounded corners , light colors i love those. And instead of using the vector image for that meeting in front page , maybe you should buy a real meeting image from Istock photo , first try with diffrent pictures and you can buy the one that looks more suitable with the site.
As for header and menu , i was talking about something like this
http://imuploader.com/images/f8mk0qje8fqttm7iv3p.jpg
And its my honest opinion, not as in a designer or critique but as a regular internet user.