Textures with glOrtho(...)

[TCIAL]

Hi,
i don't work very long with Java & LWJGL. I come from C# & OpenTK and this is my first app that uses glOrtho(...) because it is a 2D snake game. So the game itself works and when using only colors then the rendering works pretty well. Now i want to use textures but it only renders gray quads without any textures. Code is below, maybe you can find out what's the problem

package CDG.SnakeGame;
import java.io.*;
import java.nio.*;
import java.util.*;
import org.lwjgl.*;
import org.lwjgl.input.Keyboard;
import org.lwjgl.opengl.*;
import de.matthiasmann.twl.utils.*;
import de.matthiasmann.twl.utils.PNGDecoder.Format;

public class Main 
{
	private boolean interrupted = false;
	private int actCount = 0;
	private int[] textures;
	private String textureFolder = "/textures/";
	private String[] textureFiles = {"body_texture.png","head_texture_0.png","head_texture_1.png","head_texture_2.png","head_texture_3.png","apple.png"};
	
	private void init()
	{
		WorldManager.setWorld(new SnakeWorld(40,30,20));
		try
		{
			Display.setDisplayMode(new DisplayMode(800,600));
			Display.create();
			Display.setTitle("CDGSnake");
		}
		catch(LWJGLException e)
		{
			e.printStackTrace();
			System.exit(-1);
		}
		
		try
		{
	        textures = new int[6];
			loadTextures();
		}
		catch(Exception e)
		{
			e.printStackTrace();
			System.exit(-1);
		}
		
		GL11.glMatrixMode(GL11.GL_PROJECTION);
		GL11.glLoadIdentity();
		GL11.glOrtho(0, 800, 600, 0, -1, 1);
		GL11.glMatrixMode(GL11.GL_MODELVIEW);
		GL11.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
		GL11.glEnable(GL11.GL_TEXTURE_2D);
		
		initWorldObjects();
	}
	
	private void initWorldObjects()
	{
		for(int y = 0; y < WorldManager.getWorld().getHeight(); y++)
		{
			for(int x = 0; x < WorldManager.getWorld().getWidth(); x++)
			{
				if(y == 0 || y == WorldManager.getWorld().getHeight()-1 || x == 0 || x == WorldManager.getWorld().getWidth()-1)
				{
					Wall w = new Wall();
					WorldManager.getWorld().addObject(w, x, y);
					System.out.println("Creating wall @"+x+"/"+y);
				}
			}
		}
		SnakeHead h = new SnakeHead();
		WorldManager.getWorld().addObject(h,new Random().nextInt(WorldManager.getWorld().getWidth()-2)+1,new Random().nextInt(WorldManager.getWorld().getHeight()-2)+1);
		WorldManager.getWorld().spawnFood();
	}
	
	private void renderFrame()
	{
		GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT); 
		List<Entity> objects = WorldManager.getWorld().getObjects(null);
		
		for(int i = 0; i < objects.size(); i++)
		{
			//objects.get(i).act();
			if(objects.get(i).getClass() == Wall.class)
			{
				GL11.glColor3f(0.65f, 0.65f, 0.65f);
			}
			else if(objects.get(i).getClass() == SnakeHead.class)
			{
				int dir = ((SnakeHead)objects.get(i)).getDirection();
				GL11.glBindTexture(GL11.GL_TEXTURE_2D, textures[dir+1]);
				//GL11.glColor3f(1.0f, 1.0f, 1.0f);
			}
			else if(objects.get(i).getClass() == SnakeBody.class)
			{
				GL11.glBindTexture(GL11.GL_TEXTURE_2D, textures[0]);
				//GL11.glColor3f(1.0f, 1.0f, 1.0f);
			}
			else
			{
				GL11.glBindTexture(GL11.GL_TEXTURE_2D, textures[5]);
				//GL11.glColor3f(1.0f, 1.0f, 1.0f);
			}
			GL11.glBegin(GL11.GL_QUADS);
				GL11.glTexCoord2f(0.0f, 1.0f);
				GL11.glVertex2i(((objects.get(i).getX())*WorldManager.getWorld().getTileSize()), ((objects.get(i).getY())*WorldManager.getWorld().getTileSize()));
				GL11.glTexCoord2f(1.0f, 0.0f);
				GL11.glVertex2i(((objects.get(i).getX())*WorldManager.getWorld().getTileSize())+WorldManager.getWorld().getTileSize(), ((objects.get(i).getY())*WorldManager.getWorld().getTileSize()));
				GL11.glTexCoord2f(1.0f, 1.0f);
				GL11.glVertex2i(((objects.get(i).getX())*WorldManager.getWorld().getTileSize())+WorldManager.getWorld().getTileSize(), ((objects.get(i).getY())*WorldManager.getWorld().getTileSize())+WorldManager.getWorld().getTileSize());
				GL11.glTexCoord2f(0.0f, 1.0f);
				GL11.glVertex2i(((objects.get(i).getX())*WorldManager.getWorld().getTileSize()), ((objects.get(i).getY())*WorldManager.getWorld().getTileSize())+WorldManager.getWorld().getTileSize());
				
			GL11.glEnd();
			
		}
	}
	
	private void loadTextures() throws IOException
	{
		
		for(int i = 0; i < 6; i++)
		{
			textures[i] = GL11.glGenTextures();
			GL13.glActiveTexture(GL13.GL_TEXTURE0);
			System.out.println(i);
			GL11.glBindTexture(GL11.GL_TEXTURE_2D, textures[i]);
			InputStream in = new FileInputStream(new File(".").getAbsolutePath()+textureFolder+textureFiles[i]);
			ByteBuffer buf = null;
			int th = 0;
			int tw = 0;
			try 
			{
				PNGDecoder decoder = new PNGDecoder(in);
				buf = ByteBuffer.allocateDirect(4*decoder.getWidth()*decoder.getHeight());
				decoder.decode(buf, decoder.getWidth()*4, Format.RGBA);
				th = decoder.getHeight();
				tw = decoder.getWidth();
				System.out.println(tw+"/"+th);
				buf.flip();				
			} 
			finally 
			{
				in.close();
			}
			GL13.glActiveTexture(GL13.GL_TEXTURE0);
			GL11.glPixelStorei(GL11.GL_UNPACK_ALIGNMENT, 1);
			GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, tw, th, 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, buf);
			GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_REPEAT);
			GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL11.GL_REPEAT);
			GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_NEAREST);
			GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR_MIPMAP_LINEAR);
			System.out.println(GL11.glGetError()==GL11.GL_NO_ERROR);
		}
	}
	
	private boolean checkExitKeys()
	{
		return Keyboard.isKeyDown(Keyboard.KEY_ESCAPE);
	}
	
	private void loop()
	{
		init();
		Keyboard.enableRepeatEvents(true);
		while(!interrupted)
		{
			
			if(Keyboard.getNumKeyboardEvents() > 0)
			{
				while(Keyboard.next())
				{
					char key = Keyboard.getEventCharacter();
					switch(key)
					{
						case 'w':
							WorldManager.setKey('w',true);
							break;
						case 'd':
							WorldManager.setKey('d',true);
							break;
						case 's':
							WorldManager.setKey('s',true);
							break;
						case 'a':
							WorldManager.setKey('a',true);
							break;
					}
				}
				
			}
			
			if(actCount == 6)
			{
				List<Entity> objects = WorldManager.getWorld().getObjects(null);		
				for(int i = 0; i < objects.size(); i++)
				{
					objects.get(i).act();
				}
				actCount = 0;
			}
			Display.sync(60);
			renderFrame();
			interrupted = checkExitKeys() || Display.isCloseRequested();
			Display.update();
			actCount++;
		}
	}
	
	public static final void main(String[] argv)
	{
		new Main().loop();
	}
	
	public SnakeWorld getWorld()
	{
		if(WorldManager.getWorld() == null)
			System.out.println("WTF?!");
		return WorldManager.getWorld();
	}
}

~Josh