I have a player class and camera class. I want my model to move and the camera to follow it. Simple enough, but when I move my model it decides to fly off the screen and then stops somewhere far in the distance, and then moves up and down on the Y axis. I'm not exactly sure where I went wrong with this one. The camera also doesn't move either, but that's not as much of an issue right now.

class Player
    {
        Model playerModel;
        public Matrix playerWorld;
        Matrix[] playerTransforms;

        public float speed = 2f;
        public float rotationRate = 0.3f;

        public Vector3 Position { get; set; }
        public float RotationX { get; set; }
        public float RotationY { get; set; }
        public float Scale { get; set; }

        public Player()
        {
            playerWorld = Matrix.CreateScale(.1f);
            this.Position = new Vector3(0, 1f, 0);
        }

        public void LoadContent(ContentManager content)
        {
            playerModel = content.Load<Model>("p1_wedge");
            playerTransforms = new Matrix[playerModel.Bones.Count];
            playerModel.CopyAbsoluteBoneTransformsTo(playerTransforms);
        }

        public void Update(float dt)
        {
            KeyboardState kbs = Keyboard.GetState();

            if (kbs.IsKeyDown(Keys.W))
            {
                playerWorld += Matrix.CreateTranslation(Vector3.Forward * speed  * dt);
            }

            if (kbs.IsKeyDown(Keys.S))
            {
                playerWorld += Matrix.CreateTranslation(playerWorld.Backward * speed * dt);
            }

            if (kbs.IsKeyDown(Keys.A))
            {
                Vector3 temp = playerWorld.Translation;
                playerWorld.Translation = Vector3.Zero;
                playerWorld += Matrix.CreateRotationY(rotationRate * dt);
                playerWorld.Translation = temp;
            }

            if (kbs.IsKeyDown(Keys.D))
            {
                Vector3 temp = playerWorld.Translation;
                playerWorld.Translation = Vector3.Zero;
                playerWorld += Matrix.CreateRotationY(-rotationRate * dt);
                playerWorld.Translation = temp;
            }
        }

        public void Render(ThirdPersonCam cam)
        {
            foreach (ModelMesh mesh in playerModel.Meshes)
            {
                foreach (BasicEffect effect in mesh.Effects)
                {
                    effect.View = cam.view;
                    effect.Projection = cam.proj;
                    effect.World = playerTransforms[mesh.ParentBone.Index] * playerWorld;
                }
                mesh.Draw();
            }
        }
    }

That's the player class. The error lies within the draw or update method, but I'm not sure what I'm looking for. When I press "w" it seems like the model moves behind me at first.

public class ThirdPersonCam
    {
        public Matrix view;
        public Matrix proj;

        public ThirdPersonCam()
        {
            proj = Matrix.CreatePerspectiveFieldOfView(0.78f, 1.7777f, 1f, 10000f);
        }

        public void CameraUpdate(Matrix objectToFollow)
        {
            Vector3 camPosition = objectToFollow.Translation + (objectToFollow.Backward * 10f) + (objectToFollow.Up * 15f) + (objectToFollow.Left * 1f);
            Vector3 camTarget = objectToFollow.Translation;

            view = Matrix.CreateLookAt(camPosition, camTarget, Vector3.Up);
        }

There's the camera class. This doesn't work either, as I have called the CameraUpdate method in my main game class and the camera doesn't move at all. The camera is following the player.playerWorld matrix when I call it.

Alrighty so I figured out the problem. I actually had two cameras going at once somehow. So now I'm only using my 3rd person cam. The rotation with a and d work fine, when you can get the model in view...This usually involves some guess work and moving back and forth with w and s. My values for the camera have also changed.

I'm still having a hard time actually finding the model and chasing it. I've been messing around with the values a bit but nothing seems to work right

view = Matrix.CreateLookAt(camPosition, camTarget, Vector3.Up);