VS 2010 Canceling/Disposing a TCP Client from a different thread.

CheckTimeout.Interval = 2500
        'If the tcp client reported online before timeout then stop timer.
        If UserStatetxt.ToLower = "online" Then
            CheckTimeout.Stop()
        ElseIf UserStatetxt.ToLower = "connecting..." Then
            'If it still says that it is connecting then report a timeout.
            txtStatus.Text = "Timeout"
            'Now stop the backgroundworker from being busy by closing the Tcp client connection
            bwConnect.CancelAsync()
            'cancel async doesn't work
            'i need something like Server.close() for my tcp client but this is another thread
        End If

Private Sub bwConnect_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles bwConnect.DoWork
        Dim Server As New System.Net.Sockets.TcpClient()
        Try
            Server.Connect(txtIP.Text, txtPort.Text)
        Catch ex As Exception
            UserStatetxt = "error"
            UserStateEx = ex.Message
        Finally
            If Server.Connected = True Then
                UserStatetxt = "online"
            End If
            Server.Close()
        End Try
    End Sub