Double messages

[nerublanco]

Good Day, I have vista and outlook 2007. The outlooks was working fine with my accounts (4). suddenly it stops downloading emails from two of my gmail accounts. Just showing an error (time out....) After reading and doing here and there, suddenly it started downloading again all the messages from all my accounts, like if it was a new installation. How do I stop that and how do I get rid of the double messages.

Thanks