Hi,
Set the report credential like
ReportDocument rptdc = new ReportDocument();
CrystalReportViewer rptViewer = new CrystalReportViewer();
string Str_FullPath;
rptdc.Load(this.FullPath);
report.DataSourceConnections(0).SetConnection("Server", "Database", "UserName", "password");
rptViewer.ReportSource = rptdc;
this.reportviewer.Child = rptViewer;
Thanks,
Adersh Ram BK