I have two clients who use mail merge features in Word. One is using Windows XP and the other Windows Vista. Both use 2007 Office System. The clien who use XP doesn't have a problem in creating the recipient list using MS Query. But the one who is using Vista, can not open MS Query when she clicks on the Tools button in the Select Data Source dialog box. I've checked that both have MS Query installed and it can be run manually using the command MSQRY32.EXE.