Error in getting System.Windows.Forms.Timer to work.

Will do my best to put in the pertinent parts.

I added a reference to;

c:\Windows\Microsoft.net\Framework\v4.0.30319\system.Windows.forms.dll

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using System.Windows.Forms;


    public sealed partial class MainPage : Page
    {
        public System.Windows.Forms.Timer collectorTimer  = new System.Windows.Forms.Timer();
....

 //this is the event called by the timer tick. 
        private void collect(Object myObject, EventArgs e)
        {
            if (timerSwitch == true)
            {
                measuringDevice.mostRecentMeasure = measuringDevice.GetMeasurement();
                measuringDevice.dataCaptured[arrayPosition] = measuringDevice.mostRecentMeasure;
                arrayPosition++;
                //display
                currentMeasurementDisplay.Text = measuringDevice.mostRecentMeasure.ToString();
            }
            else
            {
                //throw an expcetion here
            }
        }

  private void startButton_Click(object sender, RoutedEventArgs e)
        {
            //vars i need
            collectorTimer.Interval = 15000;
            collectorTimer.Tick += new EventHandler(collect);
            collectorTimer.Start();

        }