System.IndexOutOfRangeException

Question

I running the program but come out this error. I cannot find how to fix it, can anyone help me?

int counter = 0;
int select;
public Form1()
{
InitializeComponent();
}

private void TeachingPage()
{
lblTitle.Visible = false;
btnAnimal.Visible = false;
btnFlower.Visible = false;
btnInsect.Visible = false;
btnStationery.Visible = false;
btnShape.Visible = false;
btnColour.Visible = false;
btnFruit.Visible = false;
btnVehicle.Visible = false;
lblFileName.Visible = true;
pictureBox1.Visible = true;
}

private void MainPage()
{
lblTitle.Visible = true;
btnAnimal.Visible = true;
btnFlower.Visible = true;
btnInsect.Visible = true;
btnStationery.Visible = true;
btnShape.Visible = true;
btnColour.Visible = true;
btnFruit.Visible = true;
btnVehicle.Visible = true;
lblFileName.Visible =false;
pictureBox1.Visible = false;
counter = 0;
SpeakCancel();
timer1.Stop();
}

private void Speak()
{
SpeechSynthesizer s = new SpeechSynthesizer();
s.SelectVoiceByHints(VoiceGender.Male);
s.SpeakAsync(lblFileName.Text);
s.SpeakAsync(lblFileName.Text);
}

private void SpeakCancel()
{
SpeechSynthesizer s = new SpeechSynthesizer();
s.SelectVoiceByHints(VoiceGender.Male);
s.SpeakAsyncCancelAll();
}

private void btnAnimal_Click(object sender, EventArgs e)
{
TeachingPage();
counter++;
string path = @"C:\Users\Tan Wei Shen\Desktop\FYP\Animal";
string[] filePaths = Directory.GetFiles(path, "*.jpg");

pictureBox1.Image = Image.FromFile(filePaths[counter]);
lblFileName.Text = Path.GetFileNameWithoutExtension(filePaths[counter]); //show name of the image
Speak();

timer1.Start();
select = 1;
}

private void btnInsect_Click(object sender, EventArgs e)
{
TeachingPage();
counter++;
string path = @"C:\Users\Tan Wei Shen\Desktop\FYP\Insect";
string[] filePaths = Directory.GetFiles(path, "*.jpg");

pictureBox1.Image = Image.FromFile(filePaths[counter]);
lblFileName.Text = Path.GetFileNameWithoutExtension(filePaths[counter]); //show name of the image
Speak();

timer1.Start();
select = 2;
}

private void timer1_Tick(object sender, EventArgs e)
{
counter++;
if (select == 1)
{
string path = @"C:\Users\Tan Wei Shen\Desktop\FYP\Animal";
string[] filePaths = Directory.GetFiles(path, "*.jpg");

if (counter < filePaths.Length)
{
pictureBox1.Image = Image.FromFile(filePaths[counter]);
lblFileName.Text = Path.GetFileNameWithoutExtension(filePaths[counter]);
Speak();
}
else
{
MainPage();
}
}
else if (select == 2)
{
string path = @"C:\Users\Tan Wei Shen\Desktop\FYP\Insect";
string[] filePaths = Directory.GetFiles(path, "*.jpg");

if (counter < filePaths.Length)
{
pictureBox1.Image = Image.FromFile(filePaths[counter]);
lblFileName.Text = Path.GetFileNameWithoutExtension(filePaths[counter]);
Speak();
}
else
{
MainPage();
}
}
}
}