Outlook and auto-filling address fields

Outlook 2002 seems to auto-fill the address fields from any recent email address that it has seen, rather than the email addresses in my contacts file.

The problem with this is that if I've ever sent an email to someone called Andrew, that address will always show up every time I want to send an email to a more significant Andrew, that I work with. Likewise, if I receive an email from a work colleague from their home address, you have to be permanently careful not to send emails to this address, rather than the correct address which is stored in the contacts db.

Anyone out there resolved this problem?

Thanks

Ben
Ben Heald