outlook 2000 automatically changing e-mail address

[hotzel]

how can I prevent Outlook 2000 to automatically replace a
manually entered e-mail address for a contact with the
first entry.
For example:
For contact "jim" I have an e-mail address "jim@abc" and
an email 2 address of "jim@xyz".
I want a specific message to go to the email 2 address
and manually enter "jim@xyz" in the To field.

When Outlook sends the message, it replaces the "jim@xyz"
with "jim@abc" and sends the message to that last
account.