Um, if I try your link then I get "Server not found". But if I try without the "www", I get a page with some images proclaiming "Noteable Music of Cambridge" on a page titled "Index". (You might want to change that page title, btw.) I honestly haven't the slightest clue why that would be, because the only problems I've encountered have been in the opposite direction, i.e. sites work with "www" but don't without. ...I'll look into it. In the meantime, does using/not using the "www" prefix change anything for you?