showing Instance failure when executing connection string in ASP.net (C#)

[sangituttu]

am already set a connection string in web config file as

<connectionStrings>
        <add name="con" connectionString="Data Source=ashii\\sqlexpress;Initial Catalog=test;Integrated Security=SSPI" providerName="System.Data.SqlClient"/>
    </connectionStrings> 

and try to access in code as

 SqlConnection con1=new SqlConnection (System.Configuration.ConfigurationManager.ConnectionStrings["con"].ConnectionString);
 
        con1.Open();

from ths step result is instance failure .How can i solve this

[PsychoCoder]

It sure would help if we knew the exact error message you're getting. I could take a guess but it would be easier if you let us know exactly what it says :)

[sangituttu]

its instance failure at the step Con1.open();

[adriancs]

Yes, we know where it stopped.
what is the Error Message? Exception Message?

[monukumar]

yes, it shows the exception error which shows the "Instance failure"

[Frinavale]

With no description about what type of exception you are getting the only thing that I can suggest is:

Please ensure that your connection string is correct.

For more information about connection strings please see this MSDN article about Connection String Syntax.

-Frinny