Crystal Report not displaying with SQL Server Authentication ?

Hi all
My SQL server database resides in server and I have created a user and password for that database. From my vb application , I'm connecting to database useing SQL server Authentication. My crystal reports are connected to the database using ODBC throu SQL Server authentication with same user name password. At design time it is working fine(for preview) but from the application it is showing an error "Can not open SQL Server". Can you help me please?

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