Getting a "System.IndexOutOfRangeException"

Question

Error:

System.IndexOutOfRangeException at System.Data.ProviderBase.FieldNameLookup.GetOrdinal(String fieldName) at System.Data.SqlClient.SqlDataReader.GetOrdinal(String name) at System.Data.SqlClient.SqlDataReader.get_Item(String name) at

I alter my stored procedure to add two new columns to my result, the stored procedure by itself seems to be working but when i add the new columns to my SQlDataReader im getting that error

Model

public class StudentRecordFull : StudentRecord
{
    public double CreditProgress { get; set; }
    public string EnrollmentStatus { get; set; }
    public int IsEnrolled { get; set; }
    public string YRQLastAttended { get; set; }
    public int Mandatory { get; set; }
    public double GPA { get; set; }
    public string TotalPrint { get; set; }
    public int Balance { get; set; }

}

my Method

public StudentRecordFull GetStudent(int sid)
    {
        StudentRecordFull s = new StudentRecordFull();
        using (SqlConnection myConnection = new SqlConnection(ProductionDataConnString))
        {
            SqlCommand myCommand = new SqlCommand("usp_GetStudent", myConnection);
            myCommand.CommandType = CommandType.StoredProcedure;
            SqlParameter SIDParameter = myCommand.Parameters.Add("SID", SqlDbType.Char, 9);
            SIDParameter.Value = sid;

            myConnection.Open();
            using (SqlDataReader oReader = myCommand.ExecuteReader())
            {
                while (oReader.Read())
                {
                    s.SID = SafeGetString(oReader, "SID");
                    s.FirstName = SafeGetString(oReader, "FirstName");
                    s.LastName = SafeGetString(oReader, "LastName");
                    s.AdvisorName = SafeGetString(oReader, "Advisor");
                    s.AdvisorSID = SafeGetString(oReader, "AdvisorSID");
                    s.PathwayName = SafeGetString(oReader, "PathwayName");
                    s.PathwayID = SafeGetInt(oReader, "PathwayId");
                    s.SubPathwayID = SafeGetInt(oReader, "SubPathwayId");
                    s.SubPathwayName = SafeGetString(oReader, 
                                                      "SubPathwayName");
                    //s.TotalPrint = SafeGetString(oReader, "ploplo");
                    s.Credits = SafeGetInt(oReader, "CreditsEarned");
                    s.Phone = SafeGetString(oReader, "DaytimePhone");
                    s.DOB = SafeGetString(oReader, "DOB");
                    s.Address = SafeGetString(oReader, "Address");
                    s.City = SafeGetString(oReader, "City");
                    s.State = SafeGetString(oReader, "State");
                    s.Zip = SafeGetString(oReader, "Zip");
                    s.Email = SafeGetString(oReader, "Email");
                    s.CreditProgress = SafeGetDouble(oReader, 
                                           "CreditProgress");
                    s.EnrollmentStatus = SafeGetString(oReader, 
                                           "EnrollmentStatus");
                    s.IsEnrolled = SafeGetInt(oReader, "IsEnrolled");
                    s.YRQLastAttended = SafeGetString(oReader, 
                                            "YRQLastAttended");
                    s.Mandatory = SafeGetInt(oReader, "Mandatory");
                    s.GPA = SafeGetDouble(oReader, "GPA");
                    s.Balance = SafeGetInt(oReader, "Balance");
                    //s.TotalPrint = SafeGetString(oReader, "TotalPrint");

                }
                myConnection.Close();
            }
        }
        return s;
    }

Helper

private int SafeGetInt(SqlDataReader reader, string colName)
    {
        int i = 0;
        if (!DBNull.Value.Equals(reader[colName]))
        {
            int.TryParse(reader[colName].ToString(), out i);
        }
        return i;
    }

If i remove the new columns everything works great is like it cant not read those columns .

Any idea?