VB Error connecting to MS SQL Server 2005 Express

tips http://msdn.microsoft.com/en-us/library/bb264566%28SQL.90%29.aspx

I'd check to make sure that the SQL Server 2005 Express Edition has been configured for network connectivity.   The default install does NOT enable network connection.
Take a look at the following (about 1/2 way down)
http://msdn.microsoft.com/en-US/library/ms345154(v=SQL.90).aspx 

the problem is software
I am not able to do it communicate with the database
but using other programs can

Take a look at these example connection strings...  The express edition typically has an "instance name" of SQLEXPRESS
http://www.connectionstrings.com/sql-server-2005 

I tried the forms on this site, the ideal would be to try to find something in the code

thanks

Well, we don't really have much to go on, since we can't see what values are being used to build the connection string.
Here is what I'd guess would be the correct connection string:
    SQL = "Provider=SQLNCLI;Data Source=" & Servidor.Text & "\SQLEXPRESS; Initial Catalog=" & BancoDados.Text & ";Password=" & Senha.Text & ";User ID=" & Login.Text & ";"

I found the solution
ip: xxxx \ SQLEXPRESS
and found new problem
how to make a vb6 program that connects to a database
ms sql server 2005 express
that runs on x84
run on computers with x64 windows 7?

What kind of errors are you getting?

Run-time error '3706'

i'm use win 7 x64

the problem is in software that is not working on x64, no with the database

Error 3706 is all about the database provider... did you try it?

good