install MSDE200A

Hi can you help me with this problem with msde
I have installed MSDE200A and i didn’t gave any password(setup BLANKSAPWD=1).
My configuration code for the connection with msde is:
<appSettings>
<add key="DSN" value="Initial Catalog=dyt_mac;Data
Source=localhost;Integrated Security=SSPI;"/>
</appSettings>
When i try to connect with the database this error occurs:
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: SQL Server does not
exist or access denied.
Thank you!
Hi,
the DataSource value should be '(local)' including the brackets.