Cannot receive complete string

void CsocketDlg::OnClickedBsend()
{
    // TODO: Add your control notification handler code here
    int iLen;
    int iSent;
    //sync controls with variables
    UpdateData(TRUE);
    //if(m_dSetThresholdFineDfLB.Create()==IDOK)
        //m_strMessage = m_dSetThresholdFineDfLB.m_sFrameLB;
    //UpdateData(FALSE);
    if(m_strMessage  != " ")
    {
        iLen = m_strMessage.GetLength();
        //send the message
        iSent = m_sConnectSocket.Send(LPCTSTR(m_strMessage),iLen);
        //were we able to send the message
        if(iSent == SOCKET_ERROR)
        {
        }
        else
        {
            //Add the message to the list box
            m_ctlSent.AddString(m_strMessage);
            //sync the variables with the control
            UpdateData(FALSE);
        }
    }
}

void CsocketDlg::OnReceive(void)
{
    char *pBuf = new char[1025];
   int iBufSize = 1024;
   int iRcvd;
   CString strRecvd;
   //receive the message
    iRcvd = m_sConnectSocket.Receive(pBuf, iBufSize);
    //did we receive anything?
      if(iRcvd == SOCKET_ERROR)
   {
   }
   else
   {
       //truncate the end of the message
       pBuf[iRcvd] = NULL;
       //copy the message to CString
       strRecvd = pBuf;
       //add the message to the received list box
       m_ctlRecvd.AddString(strRecvd);
       //sync the variables with the controls
       UpdateData(FALSE);
   }
}