Please my crystal report asks for login credentials when deployed a the server

ReportDocument rptDoc = new ReportDocument();
       rptDoc.Load(rpt file name with full path);

       ParameterFieldDefinitions crParameterFieldDefinitions ;
       ParameterFieldDefinition crParameterFieldDefinition ;
       ParameterValues crParameterValues = new ParameterValues();
       ParameterDiscreteValue crParameterDiscreteValue = new ParameterDiscreteValue();

       crParameterDiscreteValue.Value = textBox1.Text;
       crParameterFieldDefinitions = rptDoc.DataDefinition.ParameterFields;
       crParameterFieldDefinition = crParameterFieldDefinitions["CustName"];
       crParameterValues = crParameterFieldDefinition.CurrentValues;

       crParameterValues.Clear();
       crParameterValues.Add(crParameterDiscreteValue);
       crParameterFieldDefinition.ApplyCurrentValues(crParameterValues);

       crystalReportViewer1.ReportSource = rptDoc;
       crystalReportViewer1.Refresh();