There might be several reasons why you'd get an error message, including:

• The site you're visiting might be busy or temporarily down. This can happen frequently, especially when a site is extremely popular and their server is overloaded. Try again later, problems like this are usually resolved in time.
• The site might be denying people access, intentionally or unintentionally. You might consider trying to contact the webmaster directly via email.
• The site simply might no longer exist. If you follow a link from the Yahoo! Directory to a website that no longer exists, you can use our Report a Dead Link form to let us know and we'll remove it from our Directory.