Data-Set login prompt

Hello all,

I am trying to create reports using two data-tables in the dataset which is source for the designing of crystal report. I am using sqlexpress as database for our asp.net web application.

But the the crystalReportViewer is asking for credentials of the database and my database dont have any user_id or password.

The question is "Why it is asking for credentials? " and "Is there any default userId and password for database?" I am stuck with this from last 2 weeks. Please reply.😭

Thank You...