When run a project which programed by VB, it received a Message Box "Run-time error '429':ActiveX component can't create object". This project need to connect SQL Server, and this problem only occured when the system installed SQL Server 2008, but it is OK in SQL Server 2005. If the system installed both SQL Server 2005 and 2008, it is OK. So maybe there are some dll has been changed between SQL Server 2005 and SQL Server 2008, but I don't known how to fix this porblem. It is emergency, for SQL Server 2008 is new for me, so I can't find more information about it. It is appreciate for your help, thank you very much.