After adding a sub email account to Outlook 2007 I receive constant password prompts from both accounts. Both the default and the sub accounts send and receive emails fine. I have used the so called Mr. Fix it from MS which didn't correct the problem. I can disable the sub account under Tools/Options or remove it and the problem stops. I have gone so far as reinstalling a clean copy of Windows 7 and Office 2007 with alllllll the updates and the problem remains. Any ideas?