New Post: Webpage won't load in web.load method

I am trying to load a wepage using the following code but the process hangs and times out at the web.load

 HtmlAgilityPack.HtmlWeb web = new HtmlWeb();
        HtmlAgilityPack.HtmlDocument doc = web.Load("http://www.knowledge.scot.nhs.uk/clear/answers.aspx");

        List<string> hrefTags = new List<string>();

        foreach (HtmlNode link in doc.DocumentNode.SelectNodes("//div[@class=\"boxInner\"]"))
        {
            HtmlAttribute att = link.Attributes["href"];
            hrefTags.Add(att.Value);
        }