Error: Index was outside the bounds of the array while biding Repeater using C# in ASP.Net

Oh Lord, I have never worked on a project that is as frustrating as this.

When one complicated problem is solved, just when I think I am done, another problem comes up.

A few days ago, Dharmendr was kind enough to help me solve this problem on this link (pages 2 and 3).

http://www.aspforums.net/Threads/107087/Error-SystemDataDataRowView-does-not-contain-a-property-with-the-name-MarineRegNo-using-C-in-ASPNet/?p=2

Right now, what is  happening is that when I enter an account number and no record exists for that account number, I can enter records, click submit and everything is saved just fine.

The issue is if I enter an account number and it pulls up the existing records, if I just make one change and click submit, I get the following error:

Index was outside the bounds of the array.

That error points to this block of code in the markup:

Markup:

    <%foreach (System.Data.DataRow row in dtAirInfoTable.Rows)
     {%>
     <tr>
      <td>
       <span class="form-control" style="width: 493px; color: #0093B2;font-weight: bold;"> <%=row.ItemArray[1].ToString()%></span>
      </td>
      <td align="center">
       <span class="form-control txtPayerret" style="width: 400px;color: #0093B2; font-weight: bold;"><%=row.ItemArray[2].ToString()%></span>
      </td>
     </tr>
     <tr>
      <td>
       <span class="form-control" style="width: 493px; color: #0093B2;font-weight: bold;"> <%=row.ItemArray[3].ToString()%></span>
      </td>
      <td align="center">
       <span class="form-control txtPayerret" style="width: 400px;color: #0093B2; font-weight: bold;"><%=row.ItemArray[4].ToString()%></span>
      </td>
     </tr>
    <% } %>
    
    
    C#
        DataTable regtable = ViewState["CurrTable"] as DataTable;
 
        try
        {
            conn.Open();
 
            if (regtable != null)
            {
                foreach (DataRow row in regtable.Rows)
                {
                    string txBoatRegNum = row.ItemArray[1] as string;
                    string txTaxPayerRet = row.ItemArray[2] as string;
                    string txVesselRegNum = row.ItemArray[3] as string;
                    string txVTaxPayerRet = row.ItemArray[4] as string;
 
                    //prevent money data types from breaking. If user does not enter value, then enter 0 in its place
                    //This sub will store Marine and Vessel info to the database.
                    if (txTaxPayerRet != null & txVTaxPayerRet != null)
                    {
                        if (string.IsNullOrEmpty(txTaxPayerRet))
                        {
                            txTaxPayerRet = "0";
                        }
 
                        if (string.IsNullOrEmpty(txVTaxPayerRet))
                        {
                            txVTaxPayerRet = "0";
                        }
                        SqlCommand aircmd = new SqlCommand("sp_saveMarineInfo", conn);
                        aircmd.CommandType = CommandType.StoredProcedure;
                        aircmd.Parameters.AddWithValue("@pid", accountnumber.Text);
                        aircmd.Parameters.AddWithValue("@eID", Request["pageId"]);
                        aircmd.Parameters.AddWithValue("@txYr", txtTaxYr.Text);
                        aircmd.Parameters.AddWithValue("@marineRegno", txBoatRegNum);
                        aircmd.Parameters.AddWithValue("@vesselRegno", txVesselRegNum);
                        aircmd.Parameters.Add("@txretval", SqlDbType.Money).Value = decimal.Parse(txTaxPayerRet); //convert text back to money
                        aircmd.Parameters.Add("@vtxretval", SqlDbType.Money).Value = decimal.Parse(txVTaxPayerRet); //convert text back to money
                        aircmd.ExecuteNonQuery();
                    }
                }
            }

These parts are part of the C#

SetInitialRow() AddNewRowToGrid()

and they can be seen on the line I posted.

I am hoping and praying these will finally fix the issues for this stupid project.

Many, many thanks for all the incredible help here.