Two Different Tables, Each With Identical Column Names... Query Help

I have two different tables... one for all Staff, and another for all Temp Staff.  I need both to output to a datagrid, and so I need to grab both tables from a SQL query to output to my datagrid, but I can't seem to get the logic right for it to work.  Can someone give me some suggestions on why my results are blank when I'm running this query?  I thought a simple join would allow both sets of identical column names to coexist in peace...SELECT     TOP 100 PERCENT dbo.StaffDirectory.UserName, dbo.StaffDirectory.LastName, dbo.StaffDirectory.FirstName, dbo.StaffDirectory.Dept,                       dbo.StaffDirectory.Title, dbo.StaffDirectory.EMail, dbo.StaffDirectory.LocationFROM         dbo.StaffDirectory INNER JOIN                      dbo.TempStaff ON dbo.StaffDirectory.Location = dbo.TempStaff.Location AND dbo.StaffDirectory.EMail = dbo.TempStaff.Email AND                       dbo.StaffDirectory.Title = dbo.TempStaff.Title AND dbo.StaffDirectory.Dept = dbo.TempStaff.Dept AND                       dbo.StaffDirectory.FirstName = dbo.TempStaff.FName AND dbo.StaffDirectory.LastName = dbo.TempStaff.LName AND                       dbo.StaffDirectory.UserName = dbo.TempStaff.UName AND dbo.StaffDirectory.MDNo = dbo.TempStaff.MDNoIs something wrong here?  It just doesn't work =(Any suggestions would be really appreciated.Thank you