can't send command to Serial Port device

I am trying to make a small program that can send commands to a GSM modem but for some reason the commands i sent dose not seem to get through. 

i have tested to see if it was my baud rate or any of the connection properties but they all mach the once i'm using in tera term and i have no problem Communication with the modem there.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.IO.Ports;
using System.Threading;

namespace Serilportapptest
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        terminaladapter myterminal = new terminaladapter();
        //SerialPort myport = new SerialPort("COM1", 9600, Parity.None, 8, StopBits.One);
        //private SerialPort myport;

        public MainWindow()
        {
            InitializeComponent();
            

        }

        //private void myport_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        //{          
        //    txtblock1.Text = myport.ReadExisting();

        //}

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            myterminal.Connect();
            myterminal.Write(txtbox1.Text);
            txtblock1.Text = myterminal.Read();
            myterminal.Disconnect();
            txtbox1.Text = "";
            //myport = new SerialPort("COM1", 9600, Parity.None, 8, StopBits.One);            
            //Thread.Sleep(1000);
            //myport.Open();
            //Thread.Sleep(1000);
            //myport.WriteLine("AT+CSCS=UCS2");
            //Thread.Sleep(1000);
            //myport.Close();
        }

        

        
    }
}

And the class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO.Ports;
using System.Threading;

namespace Serilportapptest
{
    /// <summary>
    ///  This Class sends data to the serialport
    /// </summary>
    public class terminaladapter
    {
        public SerialPort serport = new SerialPort();
        public string DataReceived = "";

        
        public void Connect() 
        {
            serport.ReadTimeout = 2000;
            serport.WriteTimeout = 2000;
            serport.BaudRate = 9600;
            serport.DataBits = 8;
            serport.PortName = "COM1";
            serport.Handshake = System.IO.Ports.Handshake.None;
            serport.Parity = Parity.None;
            serport.StopBits = StopBits.One;

	        try 
            { 
	            if (!serport.IsOpen) 
                {
                    
                    
                    serport.Open();
                    Thread.Sleep(1000);
	                 
	            }                 
	        }
            // else already open
            catch 
            {          
	        } 
	    }

        public void Disconnect()
        {
            try
            {
                if (serport.IsOpen)
                {
                    serport.Close();
                }
            }
            // else not open
            catch
            {
            }

        }
        /// <summary>
        ///  This method sends a string to the Serialport
        /// </summary>
        public void Write(string scmd)
        {
            if (serport.IsOpen)
            {
                try
                {
                    serport.WriteLine(scmd);
                    Thread.Sleep(1000);
                }
                catch
                {
                }
            }
        }

        public string Read() 
        { 
	        try {
                System.Threading.Thread.Sleep(500);
                this.DataReceived = serport.ReadExisting().ToString();
                Thread.Sleep(1000);
                //this.DataReceived += serport.ReadLine().ToString();  
	            return (this.DataReceived); 
	        } catch(Exception e) 
            {
                return e.Message; 
	        } 
	    } 

        

    }
}

no matter what AT command i try to send nothing happens. even if i go to tere term and look up the properties on the modem that should have changed. so i assume the command never gets there but why?