Cannot Read All The Spam Messages From The Database I Cannot Read Mail In My In Box?

I cannot read mail in my in box? - cannot read all the spam messages from the database

I have a series of accounts from Yahoo, but only problems. The strange thing is that I can read e-mails in the spam folder. I deleted cookies and emptied the cache, but in vain. The problem occurs in both IE 7 and Mozilla1.5. With version 7 of Yahoo Mail I get an error that it can not reach, and the message on the original version is the error code 6 Any help would be appreciated.