Mail Merge in Adobe

Hello!  I'm trying to create a mail merge with Adobe and distribute via the email function.  I tested a few months back and it worked great.  Doing a refresher now as it's almost go time.  However, utilizing new Word doc and new Exec docs for sources, when I try to link the email address, it's only pulling up the old data that I originally tested with!  How do I get it to "unlink" and point to the documents I'm using?