Are you accessing the SQL Server from the same machine with 2003 and 2005 projects? Is it SQL Server 2005 or SQL Server Express 2005?
Check out
Configuring Services and Protocols at -
http://www.developer.com/db/article.php/3496511Regards
Jon
>Thanks Cetin,
>I don't understand, the default setting cannot allow remote connection ?
>which default setting ?
>THE SQL server is the original one.
>I only change my application from .net 2003 to .net2005 .
>Do I need to do some configuration in my .net2005 ?
>thanks a lot
