Address Book

I am using Windows 2000 Professional.

When I reply to a message the computer saves the e-mail address for me so that when I go to send a new message and I begin to type in the e-mail address, the system auto-completes the rest of the e-mail address for me. This is great.

However, when I double click on the the TO: I do not find that individual's e-mail address in the list of names. When I click on Address Book, I have 3 options. Outlook Address Book (which is empty) a subfolder under the Outlook Address Book called Contacts (this has all my old e-mail addresses) and Personal Address Book (which is also empty).

How can I find out where the system is storing the information. And how can I get the system to write the e-mail address of the recepient I reply to to my Contacts folder or my Outlook Address Book or my Personal Address Book.

Thanks.