The SQL Server does not meet minimum requirements of version 6.5 service pack 3. (Visual Database Tools)
You are connected to a version of SQL Server database that is older than version 6.5, service pack 3. The Visual Database Tools cannot work with that version of SQL Server.
Connect to a SQL Server database that is no older than SQL Server 6.5, service pack 3.
See Also
Concepts
Error Messages in Visual Database Tools