Identifying the Microsoft SQL Server Instance Name 
           Microsoft SQL Server 2000 
      -  Log in to your Microsoft SQL Server database server.
       
-  Launch the Microsoft SQL Server Network Utility (Start menu >> Programs >> Microsoft SQL Server).
           
-  Microsoft SQL Server instance names should be immediately visible.
 
        
           Microsoft SQL Server 2005 
      -  Log in to your Microsoft SQL Server database server.
       
-  Launch the Microsoft SQL Server 2005 Configuration Manager (Start menu >> Programs >> Microsoft SQL Server).
           
-  Microsoft SQL Server instance names should be immediately visible.