Read SMS though D-Link DWM 156 SMS modem

Question

Respected Sir,

I am trying to Read SMS though D-Link DWM 156 SMS modem I wrote following code. using this code I am not able to read long message

My message is

Start message
1)
2)SIOB 1204-102,ON,12/05/2012 16:71:7,6 12/05/2012 16:71:7 
3)
4)
End Message
before and after message spaces is there

 private void tmrRec_Tick(object sender, EventArgs e)
  {
  try
 
  {
 
  string strCommand = "AT+CMGL=\"REC UNREAD\"";
 
  objShortMsgColl= objSMS.ReadSMS(this.port, strCommand) ;
 
 
  foreach (ShortMsg msg in objShortMsgColl)
  {
 
 
  ListViewItem item = new ListViewItem(new string[]{ msg.Sent, msg.Sender, msg.Message });

  lvwMsg.Items.Add(item);
 
  }

Read Function

public ShortMsgColl ReadSMS(SerialPort port, string p_strCommand)
  {

 
  ShortMsgColl messages = null;
  try
  {

  #region Execute Command
  // Check connection
  ExecCommand(port, "AT", 300, "No phone connected");
  // Use message format "Text mode"
  ExecCommand(port, "AT+CMGF=1", 300, "Failed to set message format.");
  // ExecCommand(port, "AT+CFUN=1", 300, "Failed to set message format.");
  // ExecCommand(port, "AT+CCFC=0", 300, "Failed to set message format.");
  // Use character set "PCCP437"
  ExecCommand(port, "AT+CSCS=\"PCCP437\"", 300, "Failed to set character set.");
  // Select SIM storage
  ExecCommand(port, "AT+CPMS=\"SM\"", 300, "Failed to select message storage.");
  //ExecCommand(port, "AT+CMGR=\"SM\"", 300, "Failed to select message storage.");
  //AT+CPMS="ME","SM","MT"
  // Read the messages
  //string input = ExecCommand(port, "AT+CMGL=\"REC UNREAD\"", 5000, "Failed to read the messages.");
  string input = ExecCommand(port, p_strCommand, 5000, "Failed to read the messages.");
  #endregion

  #region Parse messages
  messages = ParseMessages(input);
 
 
  #endregion

  }
  catch (Exception ex)
  {
  throw ex;
  }

  if (messages != null)
  return messages;
  else
  return null;

  }