SetDataSourceLocation to CrystalReport

[lordofcsharp]

Hi to all. I have designed report and by wizard, i have set SetDataSourceLocation to server and I want to change SetDataSourceLocation at runtime by giving parameter values for userid,password,databasename,server. I am using this way how to connect at my local sqlexpress server in runtime:

crReportDocument.SetDatabaseLogon("username","pass",".\\sqlexpress","databasename");

When I run application I get always login prompt window. Any help is appraciated. Regards.