In XP & Vista
You have to clear the saved credentials through a command.
Go to START, RUN & TYPE
rundll32.exe keymgr.dll, KRShowKeyMgr
Select your account and remove. Now got back and enter your new info and save it.
In Windows 7
Go to START and type in the word CREDENTIAL MANAGER.
Find the account and remove all instances of it and go back and enter your correct info and save.
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