Dynamic Data Display - Zweiter Graph

Question

Hallo zusammen,

ich habe mir gestern mal Dynamic Data Display angeschaut und auch mal etwas rumprobiert.
Nun möchte ich einen zweiten Graphen hinzufügen. Dafür habe ich diesen Code:

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 Microsoft.Research.DynamicDataDisplay.DataSources;
using Microsoft.Research.DynamicDataDisplay;
using AForge.Math;

namespace Graph
{
    /// <summary>
    /// Interaktionslogik für MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public static int MaxSamples = 64;

        public static DataPointCollection DataPoint = new DataPointCollection();
        public static DataPointCollection DataPoint2 = new DataPointCollection();
        public static Complex[] Signal = new Complex[MaxSamples];
        public static Complex[] Spektrum = new Complex[MaxSamples];

        public MainWindow()
        {
            InitializeComponent();
        }

        private void DataWindow_Initialized(object sender, EventArgs e)
        {
            GenerateSineSamples(DataPoint, MaxSamples, 1.0);
            PlotData(DataPoint, Colors.Green, "Signal");
            //FourierTransform.FFT(Signal, FourierTransform.Direction.Forward);

            /*for (int Sample = 0; Sample < MaxSamples; Sample++)
            {
                DataPoint.Add(new DataPoint(Signal[Sample].Im, Sample));
            }*/

            GenerateCosineSamples(DataPoint2, MaxSamples, 2.0);
            PlotData(DataPoint2, Colors.Red, "Spektrum");
        }

        private void PlotData(DataPointCollection Data, Color Farbe, string Name)
        {
            var DataList = new EnumerableDataSource<DataPoint>(Data);

            DataList.SetXMapping(x => x.X);
            DataList.SetYMapping(y => y.Y);
            plotter.AddLineGraph(DataList, Farbe, 2, Name);
        }

        void GenerateSineSamples(DataPointCollection Data, int SampleCount, double Amplitude)
        {
            for (int i = 0; i < MaxSamples; i++)
            {
                Signal[i].Re = Math.Sin(i * 2 * 3.14 / MaxSamples);
            }

            for (int Sample = 0; Sample < SampleCount; Sample++)
            {
                DataPoint.Add(new DataPoint(Signal[Sample].Re, Sample));
            }
        }

        void GenerateCosineSamples(DataPointCollection Data, int SampleCount, double Amplitude)
        {
            for (int i = 0; i < MaxSamples; i++)
            {
                Signal[i].Re = Math.Sin(i * 2 * 3.14 / MaxSamples + 1.57);
            }

            for (int Sample = 0; Sample < SampleCount; Sample++)
            {
                DataPoint.Add(new DataPoint(Signal[Sample].Re, Sample));
            }
        }
    }
}

Allerdings bekomme ich nun das hier raus:

Wo steckt da der Fehler? Was habe ich falsch gemacht?

Danke für die Hilfe!