I think there is one too many \

Try

MyComputer\SQLExpress;database=MyDatabaseName;Trusted_Connection=Yes"

>Hi,
>
>When I am testing my ASP.NET to connect to SQL Server I use the following connecting string:
>
><pre>
>connString = "server=MYCOMPUTER\\SQLEXPRESS; database=MyDatabaseName; Trusted_Connection=Yes"
>

>
>But I get an error:
>
>

>Cannot open database "MyDatabaseName" requested by login. The login failed. 
>Login failed for user 'MYCOMPUTER\Dmitry' 
>

>
>I suppose the "Trusted_Connection" syntax is not recognized, right? What should I change in my connString?
>
>TIA