Interactive Brokers TWS connection not working

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:StockSharp"
xmlns:Custom="http://schemas.stocksharp.com/xaml" x:Class="StockSharp.MainWindow"
mc:Ignorable="d"
Title="MainWindow" Height="660" Width="900" Left="50" Top="50">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="130*"/>
<ColumnDefinition Width="130*"/>
<ColumnDefinition Width="504*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="35*"/>
<RowDefinition Height="594*"/>
</Grid.RowDefinitions>
<Button Content="Setting" Name="Setting" Click="Setting_Click" HorizontalAlignment="Left" VerticalAlignment="Top" Width="152" Height="35"/>
<Button Content="Connect" Name="Connect" Click="Connect_Click" Grid.Column="1" HorizontalAlignment="Left" VerticalAlignment="Top" Width="152" Height="35"/>

<Custom:SecurityPicker Name="SecurityPicker" ShowCommonStatColumns="True" Grid.ColumnSpan="3" HorizontalAlignment="Left" Height="594" Grid.Row="1" VerticalAlignment="Top" Width="892"/>

</Grid>
</Window>

using Ecng.Serialization;
using StockSharp.Algo;
using StockSharp.BusinessEntities;
using StockSharp.Configuration;
using System;
using System.Collections.Generic;
using System.IO;
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;

namespace StockSharp
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
private Connector _connector = new Connector();
private string _connectFile = "ConnectFile";

public MainWindow()
{
InitializeComponent();
if (File.Exists(_connectFile))
{
_connector.Load(new XmlSerializer<SettingsStorage>().Deserialize(_connectFile));
}
}

private void Setting_Click(object sender, RoutedEventArgs e)
{
if (_connector.Configure(this))
{
new XmlSerializer<SettingsStorage>().Serialize(_connector.Save(), _connectFile);
}
}

private void Connect_Click(object sender, RoutedEventArgs e)
{
SecurityPicker.SecurityProvider = _connector;
SecurityPicker.MarketDataProvider = _connector;
_connector.Connect();
}
private void SecurityPicker_SecuritySelected(Security security)
{
if (security == null) return;
_connector.RegisterSecurity(security);
}
}
}