Hi,I had access to my Yahoo ID last morning and now it says that the username and pwd are ionvalid... I have not changed the pwd, I have all the important mails related to my job in the mail.. I need your help in getting access to my ID.. please contact me as soon as possible.. I have very important mails in it...

I am sorry this has happened, there is no one here going to tell you how to illegally hack into your email. You will have to contact Yahoo directly to get this fixed.

Was the security question also changed? Did you try going through the forgotten password process?

We are not affiliated with Yahoo in any way, so if you can't access your ID, you have to contact them for help using the process I suggested.