I am new to game programming and to these sites for help. I am making a 2D game but I can't seem to get the collision between my character and certain tiles. I have a map filled with grass tiles and water tiles and I want to keep my character from walking on the water tiles. I have a Tiles class that I use so that the tiles are objects and also has the collision method in it, a TileEngine class used create the map and it also holds a list of Tiles, and the class James which is for my character. I also have a Camera class that centers the camera on my character if that has anything to do with the problem. The character's movement is intended to be restricted to 4 directions(up, down, left, right). As an extra note, the bottom right water tile does have collision, but the collision does not occur for any of the other water tiles.

Here is my TileEngine class

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;

namespace Test2DGame2
{
 class TileEngine : Microsoft.Xna.Framework.Game
 {
    //makes a list of Tiles objects
    public List<Tiles> tilesList = new List<Tiles>();

    public TileEngine()
    {}

    public static int tileWidth = 64;
    public static int tileHeight = 64;

    public int[,] map = {
          {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
          {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
          {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,},
          {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,},
                 };

    public void drawMap(SpriteBatch spriteBatch)
    {
        for (int y = 0; y < map.GetLength(0); y++)
        {
            for (int x = 0; x < map.GetLength(1); x++)
            {
                //make a Rectangle
                tilesList[map[y, x]].rectangle = new Rectangle(x * tileWidth, y *        tileHeight, tileWidth, tileHeight);

                //draw the Tiles objects
                spriteBatch.Draw(tilesList[map[y, x]].texture,
                    tilesList[map[y, x]].rectangle,
                    Color.White);
            }
        }
    }
 }
}

Here is my Tiles class

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;

namespace Test2DGame2
{
 class Tiles
 {
    public Texture2D texture;
    public Rectangle rectangle;

    public Tiles(Texture2D texture)
    {
        this.texture = texture;
    }

    //check to see if james collides with the tile from the right side
    public void rightCollision(James james)
    {
           if (james.GetBounds().Intersects(rectangle))
           {
               james.position.X = rectangle.Left - james.front.Width;
           }
    }        
 }
}

I have a method for rightCollision because I could only figure out how to get the collisions from specifying directions.

and here is the James class for my character

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;

namespace Test2DGame2
{
 class James
 {
    public Texture2D front;
    public Texture2D back;
    public Texture2D left;
    public Texture2D right;
    public Vector2 center;
    public Vector2 position;

    public James(Texture2D front)
    {
        position = new Vector2(0, 0);
        this.front = front;
        center = new Vector2(front.Width / 2, front.Height / 2);
    }

    public James(Texture2D front, Vector2 newPosition)
    {
        this.front = front;
        position = newPosition;
        center = new Vector2(front.Width / 2, front.Height / 2);
    }


    public void move(GameTime gameTime)
    {

        KeyboardState keyboard = Keyboard.GetState();
        float SCALE = 20.0f;
        float speed = gameTime.ElapsedGameTime.Milliseconds / 100.0f;

        if (keyboard.IsKeyDown(Keys.Up))
        {
            position.Y -=speed * SCALE;
        }
        else if (keyboard.IsKeyDown(Keys.Down))
        {
            position.Y += speed * SCALE;
        }
        else if (keyboard.IsKeyDown(Keys.Left))
        {
            position.X -= speed * SCALE;
        }
        else if (keyboard.IsKeyDown(Keys.Right))
        {
            position.X += speed * SCALE;
        }
    }

    public void draw(SpriteBatch spriteBatch)
    {
        spriteBatch.Draw(front, position, null, Color.White, 0, center, 1.0f, SpriteEffects.None, 0.0f);
    }

    //get the boundingbox for James
    public Rectangle GetBounds()
    {
        return new Rectangle(
            (int)position.X,
            (int)position.Y,
            front.Width, front.Height);
    }
 }
}