Somewhere on the mail-merge screen is the option to connect to the database. In Word 97 (and as I remember also in Word 2000):
- step 1 = make the document
- step 2 = define the datasource (must be done early in step 1, because the data definitions are needed for making the document)
- step 3 = go ahead

- What happens if you make a new document, and connect it to the new location of the data. That should be OK.
- What happens if you use the step 2 dialog to point an existing document to the new file location? That seems the crucial step. And if it works it's much easier than creating them from scratch, of course.
- Are you sure the rename to the old file location was OK, and the program has access to that old file?

Hope this helps.