SQL Server Express connection problems

[EgoSum]

I can't connect app to SQLEXPRESS via the local network.
It works on same PC.

In SQL Server Configuration Manager > SQL Server 2005 Network Configuration > Protocols for SQLEXPRESS > TCP/IP and Named Pipes - set to Enabled.

In Server Properties > Security > SQL Server and Windows Authentication mode is set.

Firewall and antivirus are stopped during tests.

What else can be cause of this trouble?

Thanks for any help.

[kenobewan]

Are you getting an error message?

[EgoSum]

Thank you for your answer. More precisely:

Error message:

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

Connection string:

mConnection = new SqlConnection(@ "data source= computerNameSer ver\sqlexpress; " +
"database=myDat abase;" +
"UID=x;PWD=y;") ;

[prabunewindia]

hi friend,
go to programs--> sql server ---->config tools--->
Sql server 2005 surface area config--->
Select surface area settings for services and connections-->
one window will open--->
in Database engine--> select remote connections--->
then select --->local and remote in radio button
u may get the solution
prabu

Thank you for your answer. More precisely:

Error message:

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

Connection string:

mConnection = new SqlConnection(@ "data source= computerNameSer ver\sqlexpress; " +
"database=myDat abase;" +
"UID=x;PWD=y;") ;