Crystal Reports :: Only 1st Record Getting Displayed Not Others In CR 2008

I have 2 parameters 1. InvoiceNum: this is array of InvoiceNumbers and 2. CompanyNickName. A single string value Now when I am passing these parameters to report only 1st record is getting displayed and not others. Ideally no. of records should be equal to no. of InvoiceNums e.g. if there are 3 invoice no. it shoudl display all 3 invoices. here is relevant code

private
void SetCurrentValuesforParameterField(
ArrayList InvoiceNumList)
ParameterFields param =
new
ParameterFields();
ParameterValues vals =
new
ParameterValues();
ParameterField parameterfield =
new
ParameterField();
foreach (object submittedValue
in InvoiceNumList)
ParameterDiscreteValue InvoiceDiscreteVal =
new
ParameterDiscreteValue();
ParameterValueKind.StringParameter; //ParameterField parameterfield1 = param[1];
parameterfield =new
ParameterField();
ParameterValueKind.StringParameter;
ParameterDiscreteValue InvoiceDiscreteVal1 =
new
ParameterDiscreteValue();
new
ParameterValues(); //
CrystalReportViewer1.ParameterFieldInfo = param;
}
vals.Add(InvoiceDiscreteVal1);
parameterfield.CurrentValues = vals;
param.Add(parameterfield);
InvoiceDiscreteVal1.Value = CompanyNickName;
vals =
parameterfield.Name = Parameter_Field_Name1;// 2nd Parameter CompanyNickName
parameterfield.ParameterValueType = parameterfield.CurrentValues = vals;
param.Add(parameterfield);
}// End of Loop
InvoiceDiscreteVal.Value = submittedValue.ToString();
vals.Add(InvoiceDiscreteVal);
parameterfield.Name = Parameter_Field_Name; //1st Paramt name InvoiceNum
parameterfield.ParameterValueType =
ParameterDiscreteValue InvoiceDiscreteVal1
new
ParameterDiscreteValue();
new
ParameterValues();
//
CrystalReportViewer1.ParameterFieldInfo = param;
}
vals.Add(InvoiceDiscreteVal1);
parameterfield.CurrentValues = vals;
param.Add(parameterfield);
InvoiceDiscreteVal1.Value = CompanyNickName;
vals =
new
ParameterValues();
//
CrystalReportViewer1.ParameterFieldInfo = param;
}
vals.Add(InvoiceDiscreteVal1);
parameterfield.CurrentValues = vals;
param.Add(parameterfield);