Crystal reports using c# in asp.net

[dilum]

private void display(string month)
{
ReportDocument customerReport;
customerReport = new ReportDocument();

customerReport = new ReportDocument();
string reportPath = Server.MapPath("CrystalReport.rpt");
customerReport.Load(reportPath);

System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString);
System.Data.SqlClient.SqlDataAdapter adpt = new System.Data.SqlClient.SqlDataAdapter("SELECT number,finalcharges from invoices where invoicedate like '"+month+"%' ", conn);

DataTable dt = new DataTable();


adpt.Fill(dt);
customerReport.SetDataSource(dt);
CrystalReportViewer1.ReportSource = customerReport;
}

month is the index value taken from a list box




this is the code ive used to generate crystal report in one of my asp.net web site under button click event. This create report without any errors but after that print function is not working and when try to do any modification it asks for further details by giving a window like this

The report you requested requires further information.
DataSet
Server name: ...........
Database name: .........
User name: ..........
Password: ...........
(checkbox) Use Integrated Security


please help me this is very urgent
thank u....