I want to take the printout of the bill in web application

I had created a crystal report...i got all the data from the database and i given the data source for crystal report..but when it redirect to the .rpt page, it will ask for the following details

Enter Values
The report you requested requires further information.

DataSet1
Server name:
Database name:
User name:
Password:
here is my code

protected void Page_Load(object sender, EventArgs e)
{
cls_bill obj = new cls_bill();
ReportDocument rptDoc = new ReportDocument();
DataSet ds = new DataSet(); // .xsd file name
ds = obj.data();

// Your .rpt file path will be below
rptDoc.Load(Server.MapPath("~/D:/BillingSystem/BillingSystem/CrystalReport2.rpt"));

//set dataset to the report viewer.
rptDoc.SetDataSource(ds);
CrystalReportViewer1.ReportSource = rptDoc;
}

plz help me..its very urgent