Here's the error :

"A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)"

I am establishing a connection between VB.NET and MS SQL 2005. In school, its running but when I am doing this at home, THIS. :(

Can you help me what's the problem?
Thanks in advance!

Couple of Possibilities:

Are you connecting to a database that is on a school PC?

If you are then you will need an instance of this database on your home PC?

-or-

It is possible that you can't access the database from home.

Are you trying to connect to SQL without having it installed on your home PC?