title: Timer do not restart after being stop once
body: <p>I am sending data through a COM port and starting my timer with a 4000 interval to send my message back if I did not receive anything before the 4 seconds.</p>
  
  <p>{Load}</p>
  
  <pre><code>Private Sub MainForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
      [...]    
      SendCard(0)
      [...]
  End Sub
  </code></pre>
  
  <p>{SendCard Sub}
  I'm sending the require information through this Sub by setting the property "LastCommand" which sends the data through the port.</p>
  
  <pre><code>Private Sub SendCard(ByVal cardIndex As Integer)
      If cardIndex &lt; Setting.Machine.Cards.Length Then
  
          'Calling LastCommand's Set()
          LastCommand = "*" &amp; Setting.Machine.Cards(cardIndex) &amp; ": STRQ" &amp; ControlChars.CrLf
      Else
          'Blah blah...
      End If
  
  End Sub
  </code></pre>
  
  <p>The property sends the data and start the Timer.</p>
  
  <pre><code>Public Property LastCommand() As String
      Get
          Return lastCommandString
      End Get
      Set(ByVal value As String)
          lastCommandString = value
          MainCOMSerialPort.Write(value)
          ResponseTimer.Start()
      End Set
  End Property
  </code></pre>
  
  <p>When I receive an answer I stop the timer and then ask the information for the next card.</p>
  
  <pre><code>Private Sub MainCOMSerialPort_DataReceived(...)
     [...]
     ResponseTimer.Stop() 'After this stop it does not trigger the Tick event any longer.
     SendCard(Array.IndexOf(Setting.Machine.Cards, CardString) + 1) 'Sending the next card
     [...]
  End Sub
  </code></pre>
  
  <p>The tick event works fine for the first card</p>
  
  <pre><code>Private Sub ResponseTimer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ResponseTimer.Tick
      'MessageBox.Show("No Respone Yet")
      LastCommand = LastCommand
  End Sub
  </code></pre>
  
  <p>So it's asking my first command every 4 second until I get something in return, but when I start over with the second command the Timer does not tick.</p>
  
  <p>I'm using .NET 4.0 and the {Windows.Forms.Timer}, I tried with Timers.Timer and did not work either I don't understand why it does not start again.</p>