My mousedown event doesnt work on laptop?

I built this simple cannon game, well the problem is my mousedown event that is responsible for shooting projectile doesn't work....
Help me please!

You can download the game here
http://www.4shared.com/rar/EPqDla1s/Canon1.html[^]

   public partial class Form1 : Form
    {
        const int SCREEN_WIDTH = 600;
        const int SCREEN_HEIGHT = 480;

        const int PROJECTILE_SPEED = 1;
        const int BASE_TARGET_SPEED = 8;
        const float COLLISION_DISTANCE = 20.0f;

        const int STARTING_LIVES = 3;
        const int GAME_DIFFICULTY_CONTROL = 3;
        const int LIVES_TILE_WIDTH = 16;

        int targetVelocityX;
        int targetVelocityY;

        Random random;

        bool isGameRunning = false;
        int lives;
        int level;
        public Form1()
        {
            InitializeComponent();
            this.ClientSize = new Size(SCREEN_WIDTH,SCREEN_HEIGHT);

            random = new Random();

        }
        #region events

        private void Form1_Load(object sender, EventArgs e)
        {
            Player.Load("player.png");
            Target.Load("target.png");
            Projectile.Load("projectile.png");
            LivesDisplay.Load("lives.png");
            TitleScreen.Load("target.png");
            TitleScreen.Top = 0;
            TitleScreen.Left = 0;
            TitleScreen.Width = SCREEN_WIDTH;
            TitleScreen.Height = SCREEN_HEIGHT;
        }

        private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            Player.Left = e.X - Player.Width/2;
            Player.Top = SCREEN_HEIGHT - Player.Height;
        }

        private void GameUpdateTimer_Tick(object sender, EventArgs e)
        {
            Projectile.Top -= PROJECTILE_SPEED;

            Target.Top += targetVelocityY;
            Target.Left += targetVelocityX;

            CheckGroundCollision();
            CheckAirCollision();
        }

        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            if(isGameRunning)
            {
              FirePorjectile();
            }
            else
            {
               BeginGame();
            }


            
        }

        #endregion

        #region gameplay methods

        private void BeginGame()
        {
            isGameRunning = true;
            lives = STARTING_LIVES;
            level = 1;

            DisplayLives();
            ResetPorjectile();
            ResetTarget();

            TitleScreen.Hide();
            Cursor.Hide();
        }
        private void EndGame()
        {
            isGameRunning = false;
            TitleScreen.Show();
            Cursor.Show();
        }
        private void KillPlayer()
        {
            
            ResetTarget();
            lives--;
            DisplayLives();

            if (lives == 0)
            {
                EndGame();
            }

        }
        private void KillTarget()
        {
            level++;
            ResetTarget();
            ResetPorjectile();
        }
        private void DisplayLives()
        {
            LivesDisplay.Width = lives * LIVES_TILE_WIDTH;
        }

        private void FirePorjectile()
        {
            if (Projectile.Bottom < 0)
            {
                Projectile.Left = Player.Left + Player.Width / 2 - Projectile.Width / 2;
                Projectile.Top = Player.Top - Projectile.Height;
            }
        }

        private void ResetPorjectile()
        {
            Projectile.Top = -Projectile.Height;
        }

        private void ResetTarget()
        {
            targetVelocityX = random.Next(2,6);
            targetVelocityY = BASE_TARGET_SPEED + level/ GAME_DIFFICULTY_CONTROL ;

            if (random.Next(2) == 0)
            {
                targetVelocityX *= -1;
            }

            Target.Top = -Target.Height;
            Target.Left = SCREEN_WIDTH / 2 - Target.Width / 2;
        }

        #endregion

        #region collision methods

        private void CheckGroundCollision()
        {
            if (Target.Bottom > SCREEN_HEIGHT)
            {
                KillPlayer();
            }
        }

        private void CheckAirCollision()
        {
            Point projectileCenter = GetCenter(Projectile);
            Point targetCenter = GetCenter(Target);

            if (Distance(projectileCenter, targetCenter) < COLLISION_DISTANCE)
            {
                KillTarget();
            }
        }

        #endregion

        #region utility methods

        private Point GetCenter(Control c)
        {
            return new Point(c.Left + c.Width/2,c.Top + c.Height/2);
        }

        private float Distance(Point pointA, Point pointB)
        {
            int a = pointA.X - pointB.X;
            int b = pointA.Y - pointB.Y;
            float c = (float)Math.Sqrt((a * a) + (b*b));
            return c;
        }

        #endregion

    }
}

Design class

partial class Form1
{
    /// <summary>
    /// Required designer variable.
    /// </summary>
    private System.ComponentModel.IContainer components = null;

    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
        }
        base.Dispose(disposing);
    }

    #region Windows Form Designer generated code

    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
        this.components = new System.ComponentModel.Container();
        this.Player = new System.Windows.Forms.PictureBox();
        this.Target = new System.Windows.Forms.PictureBox();
        this.Projectile = new System.Windows.Forms.PictureBox();
        this.GameUpdateTimer = new System.Windows.Forms.Timer(this.components);
        this.LivesDisplay = new System.Windows.Forms.PictureBox();
        this.TitleScreen = new System.Windows.Forms.PictureBox();
        ((System.ComponentModel.ISupportInitialize)(this.Player)).BeginInit();
        ((System.ComponentModel.ISupportInitialize)(this.Target)).BeginInit();
        ((System.ComponentModel.ISupportInitialize)(this.Projectile)).BeginInit();
        ((System.ComponentModel.ISupportInitialize)(this.LivesDisplay)).BeginInit();
        ((System.ComponentModel.ISupportInitialize)(this.TitleScreen)).BeginInit();
        this.SuspendLayout();
        //
        // Player
        //
        this.Player.Location = new System.Drawing.Point(92, 12);
        this.Player.Name = "Player";
        this.Player.Size = new System.Drawing.Size(32, 32);
        this.Player.TabIndex = 0;
        this.Player.TabStop = false;
        //
        // Target
        //
        this.Target.Enabled = false;
        this.Target.Location = new System.Drawing.Point(92, 106);
        this.Target.Name = "Target";
        this.Target.Size = new System.Drawing.Size(32, 32);
        this.Target.TabIndex = 1;
        this.Target.TabStop = false;
        //
        // Projectile
        //
        this.Projectile.Enabled = false;
        this.Projectile.Location = new System.Drawing.Point(137, 200);
        this.Projectile.Name = "Projectile";
        this.Projectile.Size = new System.Drawing.Size(9, 9);
        this.Projectile.TabIndex = 2;
        this.Projectile.TabStop = false;
        //
        // GameUpdateTimer
        //
        this.GameUpdateTimer.Enabled = true;
        this.GameUpdateTimer.Interval = 16;
        this.GameUpdateTimer.Tick += new System.EventHandler(this.GameUpdateTimer_Tick);
        //
        // LivesDisplay
        //
        this.LivesDisplay.Location = new System.Drawing.Point(4, 4);
        this.LivesDisplay.Name = "LivesDisplay";
        this.LivesDisplay.Size = new System.Drawing.Size(48, 16);
        this.LivesDisplay.TabIndex = 3;
        this.LivesDisplay.TabStop = false;
        //
        // TitleScreen
        //
        this.TitleScreen.Enabled = false;
        this.TitleScreen.Location = new System.Drawing.Point(172, 68);
        this.TitleScreen.Name = "TitleScreen";
        this.TitleScreen.Size = new System.Drawing.Size(100, 50);
        this.TitleScreen.TabIndex = 3;
        this.TitleScreen.TabStop = false;
        //
        // Form1
        //
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(284, 262);
        this.Controls.Add(this.TitleScreen);
        this.Controls.Add(this.LivesDisplay);
        this.Controls.Add(this.Projectile);
        this.Controls.Add(this.Target);
        this.Controls.Add(this.Player);
        this.Enabled = false;
        this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
        this.MaximizeBox = false;
        this.Name = "Form1";
        this.Text = "Form1";
        this.Load += new System.EventHandler(this.Form1_Load);
        this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseDown);
        this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseMove);
        ((System.ComponentModel.ISupportInitialize)(this.Player)).EndInit();
        ((System.ComponentModel.ISupportInitialize)(this.Target)).EndInit();
        ((System.ComponentModel.ISupportInitialize)(this.Projectile)).EndInit();
        ((System.ComponentModel.ISupportInitialize)(this.LivesDisplay)).EndInit();
        ((System.ComponentModel.ISupportInitialize)(this.TitleScreen)).EndInit();
        this.ResumeLayout(false);

    }

    #endregion

Tags: C#