I have a database that was created in Access 2000. I have used it in 2003 and now in 2007. I want to convert it to 2007. I follow the steps to open the database. Then I click the Office button and then Save As Access 2007 database. It asks for a new file name and I click "Save." Then I get a message that I am trying to open a database that is already opened exclusively by "me" and to close it and try again. Any hints?