first row in sql table not getting exported to excel dynamically

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C#

SQL-Server

SQL-Server-2008

, +

I want to export 4 columns of all 4 rows from table 'clientinfo' to an excel spreadsheet. It works leaving the first row of the table. However, the data table 'dtMainSQLData' shows all the 4 rows intact. The Spreadsheet shows only 3 rows.
My code;

SqlDataAdapter da = new SqlDataAdapter("select clientname,clientaddress1,clientaddress2,clientaddress3 from clientinfo", sqlCon);
System.Data.DataTable dtMainSQLData = new System.Data.DataTable();
da.Fill(dtMainSQLData);
DataColumnCollection dcCollection = dtMainSQLData.Columns;
// Export Data into EXCEL Sheet
Microsoft.Office.Interop.Excel.ApplicationClass ExcelApp = new Microsoft.Office.Interop.Excel.ApplicationClass();
ExcelApp.Application.Workbooks.Add(Type.Missing);
// ExcelApp.Cells.CopyFromRecordset(objRS);
for (int i = 1; i < dtMainSQLData.Rows.Count + 1; i++)
{
for (int j = 1; j < dtMainSQLData.Columns.Count + 1; j++)
{
if (i == 1)
ExcelApp.Cells[i, j] = dcCollection[j - 1].ToString();
else
ExcelApp.Cells[i, j] = dtMainSQLData.Rows[i - 1][j - 1].ToString();
}
}
ExcelApp.ActiveWorkbook.SaveCopyAs("C:\\Users\\RAJENDRAN\\Desktop\\raj2.xls");
ExcelApp.ActiveWorkbook.Saved = true;
ExcelApp.Quit();
}