winforms读取Excel文件,并将其数据插入到数据库的问题

最近开发一个winforms程序,每天要将某部门的数据(excel格式),导入SQL数据库中(以前的数据不能够覆盖),在将数据写入数据库的时候出现一个问题:每次只能写入每一条数据,写入第二条数据的时候提示:存储过程传入的参数太多.代码如下:
for (int i = 1; i < MyTable.Rows.Count; i++)
            {
                try
                {                    //MessageBox.Show(""+MyTable .Rows [i][0].ToString ()+"");                    com.Connection = access.GetConnection();
                    com.CommandText = "sp_ADDCustemor";
                    com.CommandType = CommandType.StoredProcedure;
                    SqlParameter[] param ={
                        new SqlParameter("@Cus_id", SqlDbType.VarChar),
                        new SqlParameter("@Cus_name", SqlDbType.VarChar),
                        new SqlParameter("@phone", SqlDbType.VarChar),
                        new SqlParameter("@mobile", SqlDbType.VarChar),
                        new SqlParameter("@realname", SqlDbType.VarChar),
                        new SqlParameter("@paytype", SqlDbType.VarChar),
                        new SqlParameter("@grade", SqlDbType.VarChar),
                        new SqlParameter("@dalegate", SqlDbType.VarChar),
                        new SqlParameter("@email", SqlDbType.VarChar),
                        new SqlParameter("@fax", SqlDbType.VarChar),
                        new SqlParameter("@cushttp", SqlDbType.VarChar)
                    };
                    param[0].Value = MyTable.Rows[i][0].ToString();
                    param[1].Value = MyTable.Rows[i][1].ToString();
                    param[2].Value = MyTable.Rows[i][2].ToString();
                    param[3].Value = MyTable.Rows[i][3].ToString();
                    param[4].Value = MyTable.Rows[i][4].ToString();
                    param[5].Value = MyTable.Rows[i][5].ToString();
                    param[6].Value = MyTable.Rows[i][6].ToString();
                    param[7].Value = MyTable.Rows[i][7].ToString();
                    param[8].Value = MyTable.Rows[i][8].ToString();
                    param[9].Value = MyTable.Rows[i][9].ToString();
                    param[10].Value = MyTable.Rows[i][10].ToString();
                    foreach (SqlParameter parame in param)
                    {
                        com.Parameters.Add(parame);
                    }
                    access.GetConnection().Open();
                    com.ExecuteNonQuery();
                }
                //catch { }
                finally
                {
                    access.GetConnection().Close();
                    access.Dispose();
                }
请高手指点(在调试的时候发现传了15个参数,前四个参数重复了)