When I sign in to my account, it goes to redirection in progress but nothing happens

SOURCE: flashing redirect, opening new windows

Please use Other Browser I suggest Mozilla Firefox

SOURCE: I am unable to access my Yahoo mail account.

What browser are you using? Most of the time when I see this error, the browser has been set to reject cookies (or to reject cookies from a certain site). In Firefox, this is Tools, Options, Privacy. In that section, check the box marked accept cookies and double-check the Exceptions list to make sure that Yahoo isn't blocked. In Internet Explorer, this is Tools, Internet Options, the Privacy tab. There check the Security setting for the Internet Zone and the list of sites. (Other browsers will be only a little bit different.)

I hope this helps.

Cindy Wells
(I've also had issues with other services when they can't accept logins and loop but that has usually been limited to AOL owned sites. In that case, clearing all cookies (or at least those related to the problem host), clearing the cache and restarting the browser solves the problem. That is a final thing to try.)