unable to recieve mails from yahoo mail accounts

i am using vista o.s.i have configured outlook profile for yahoo mail account.its was good until yesterday.but today when i accessing my yahoo mail account through ms outlook but unable to access the mails.it is showing error

Task ‘pop.bizmail.yahoo.com – Receiving’ reported error (0x800CCC92) : ‘Your e-mail server rejected your login. Verify your user name and password in your account properties. Under Tools, click E-mail accounts. The server responded: -ERR [SYS/TEMP] temporary problem accessing database.’

it shows “unable to login to the incoming mail server.

I checked the outlook configuration settings and yahoo pop settings every thing good but still unable to access the mails.

i am struggling with this,any help appreciable.