I have installed SQL Server 2008 R2 on my server and a C# application on Network Drive. 

When I am running this application on server, it is working fine. But the problem occurs when I am running the application from client machines.

It does not connect to the server. I get the following error

> 
> Network related specific error..
> 
> 
> 

Can anyone give me any solution ?

Connection string used:

```
<connectionStrings> 
    <add name="Truly_Paste_Solution.Win.Properties.Settings.TrulyDBAConnectionString" 
         connectionString="Data Source=.\sqlexpress;Initial Catalog=TrulyDB;Integrated Security=True;Pooling=False" 
         providerName="System.Data.SqlClient"/> 
</connectionStrings> 

```