like this:

connectionString=”Data Source=database\CORP,1433….

with the port 1433 worked fine from my computer with the firewall enabled.

A network-related or instance-specification error occurred while establishing a connection to sql Server.

This server was not found or was not accessible.Verify that the instance name is correct and sqlserver is configured to allow remote connections.(provider: SQL Network Interfaces,err:26-error locating Server/Instance Specified)

How can I fix it?

I have been using Ms-Access for the last one year….due to its size and server based need….I changed to sql server 2008…..and it works fine now. my question is how can I audit different user and their role on the database….like what if I wanna know which user is exporting data from another application like access(which I now used it for a front end)….any help ???

I am using windows 2003 professional operating system. I deployed my asp.net web application on it. It generated an error. I provided you a snapshot of it.
===============
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: SQL Network Interfaces, error: 26 – Error Locating Server/Instance Specified)
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: 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: SQL Network Interfaces, error: 26 – Error Locating Server/Instance Specified)

Source Error:

public virtual businesslogic.tlinksme.ShoppingCartClass.Cart SCart {
get {
return ((businesslogic.tlinksme.ShoppingCartClass.Cart)(this.GetPropertyValue("SCart")));
}
set {

===============
Actually, I am using Custom Profile for shopping cart as Binary.

I did not get where is the error. I googled many web sites, but I did not get the exact answer.

For your information, my SQL server 2005 has been configured correctly. SQL server 2005 names instance is running, and a web browser is also running. I have enabled TCP/IP as well as enabled remote connection.

One surprising thing is that when I deployed another server like XP, it is working well. No error at all, but when I deploy on windows 2003, an error is generated for network interface.

I need your help.

Bye.
Thank you.

I Microsoft SQL Server Management studio when I enter 'myremoteservernameSQLExpress' I am getting the below 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: SQL Network Interfaces, error: 26 – Error Locating Server / Instance
Specified".

I have done all the below steps for solving the issue:

1) Enabled tcp/ip protocol, enabled local and remote connection and restarted the instance in sqlsever surface aera configuration settings.
2) Enable tcp/ip protocol in sqlserver configuration manager.
3) Restarted sqlserver browser,mssqlserver instance.
4) Created sqlbrowser.exe exception of the file in firewall.
5) created sqlserver.exe exception of the file in firewall.
6) Enabled Allow remote connections to this server in Microsoft SQL Server Management Studio server node properties connections.

Please help me to solve this issue.