it has been two days already when I clicked Sign Up the message shows: Sorry, the page you requested was not found. Please check the URL for proper spelling and capitalization. If you're having trouble locating a destination on Yahoo!, try visiting the Yahoo! home page or look through a list of Yahoo!'s online services. Also, you may find what you're looking for if you try searching below. Has yahoo Sign Up system been down? or my computer has a problem? Please help Thanks
Probably yahoo has restricted access of website from your IP.Anyway which country do u belong? This fact may also be a reason.