Mouse rotation

Hello. Im new at LWJGL and now im trying to do something with 3D. Now i have cube object (without roof and ground Cheesy

) in my 3D world and i want to make rotation with mouse like in Counter Strike, but i worked around 2 hours and nothing happend. I was found this on google: http://www.lloydgoodall.com/tutorials/first-person-camera-control-with-lwjgl/ But even if i do not move my mouse it rotates all world really really fast, so hard to see my objects...

Here is my codes:

Code:

import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.util.glu.GLU.gluPerspective;

import org.lwjgl.input.Keyboard;
import org.lwjgl.input.Mouse;
import org.lwjgl.opengl.*;
import org.lwjgl.*;

public class ThreeDeeLWJGL{

public ThreeDeeLWJGL(){
FPCameraController camera = new FPCameraController(0, 0, 0);
float dx = 0.0f;
float dy = 0.0f;
float dt = 0.0f;
float lastTime = 0.0f;
float time = 0.0f;
float mouseSensitivity = 0.05f;
float movementSpeed = 10.0f;

try{
Display.setDisplayMode(new DisplayMode(1024, 768));
Display.setTitle("Three Dee Demo");
Display.create();
}catch(LWJGLException e){
e.printStackTrace();
}
glViewport(0, 0, Display.getWidth(), Display.getHeight());
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f, Display.getWidth() / Display.getHeight(), 1.0f, 1000.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
glClearDepth(1.0f);
glDepthFunc(GL_LEQUAL);
glEnable(GL_DEPTH_TEST);
glShadeModel(GL_SMOOTH);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);

while(!Display.isCloseRequested()){
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

time = Sys.getTime();
dt = (time - lastTime) / 1000.0f;
lastTime = time;

dx = Mouse.getDX();
dy = Mouse.getDY();
camera.yaw(dx * mouseSensitivity);
camera.pitch(dy * mouseSensitivity);

glBegin(GL_QUADS);
//Front
glColor3f(1.0f, 1.0f, 0.0f);
glVertex3f(-15f, -15f, -100f);
glVertex3f(15f, -15f, -100f);
glVertex3f(15f, 15f, -100f);
glVertex3f(-15f, 15f, -100f);
//Left side
glColor3f(0.0f, 1.0f, 1.0f);
glVertex3f(-15f, -15f, -100f);
glVertex3f(-15f, -15f, -150f);
glVertex3f(-15f, 15f, -150f);
glVertex3f(-15f, 15f, -100f);
//Right side
glColor3f(0.0f, 1.0f, 1.0f);
glVertex3f(15f, -15f, -100f);
glVertex3f(15f, -15f, -150f);
glVertex3f(15f, 15f, -150f);
glVertex3f(15f, 15f, -100f);
//Back
glColor3f(0.0f, 0.0f, 1.0f);
glVertex3f(-15f, -15f, -150f);
glVertex3f(15f, -15f, -150f);
glVertex3f(15f, 15f, -150f);
glVertex3f(-15f, 15f, -150f);
glEnd();

if(Keyboard.isKeyDown(Keyboard.KEY_W)){
camera.walkForward(movementSpeed * dt);
}
if(Keyboard.isKeyDown(Keyboard.KEY_S)){
camera.walkBackwards(movementSpeed * dt);
}
if(Keyboard.isKeyDown(Keyboard.KEY_A)){
camera.strafeLeft(movementSpeed * dt);
}
if(Keyboard.isKeyDown(Keyboard.KEY_D)){
camera.strafeRight(movementSpeed * dt);
}

glLoadIdentity();
camera.lookThrough();

Display.update();
Display.sync(60);
}
Display.destroy();
System.exit(0);
}

public static void main(String[] args) {
new ThreeDeeLWJGL();
}
}

Code:

package ThreeDee;

import org.lwjgl.util.vector.Vector3f;
import static org.lwjgl.opengl.GL11.*;

public class FPCameraController {
private Vector3f position = null;
private float yaw = 0.0f;
private float pitch = 0.0f;

public FPCameraController(float x, float y, float z){
position = new Vector3f(x, y, z);
}

public void yaw(float amount){
yaw += amount;
}

public void pitch(float amount){
pitch += amount;
}

public void walkForward(float distance){
position.x -= distance * (float)Math.sin(Math.toRadians(yaw));
position.z += distance * (float)Math.cos(Math.toRadians(yaw));
}

public void walkBackwards(float distance){
position.x += distance * (float)Math.sin(Math.toRadians(yaw));
position.z -= distance * (float)Math.cos(Math.toRadians(yaw));
}

public void strafeLeft(float distance){
position.x -= distance * (float)Math.sin(Math.toRadians(yaw-90));
position.z += distance * (float)Math.cos(Math.toRadians(yaw-90));
}

public void strafeRight(float distance){
position.x -= distance * (float)Math.sin(Math.toRadians(yaw+90));
position.z += distance * (float)Math.cos(Math.toRadians(yaw+90));
}

public void lookThrough(){
glRotatef(pitch, 1.0f, 0.0f, 0.0f);
glRotatef(yaw, 0.0f, 1.0f, 0.0f);
glTranslatef(position.x, position.y, position.z);
}
}

EDIT: I fixed it, but now, how i can make that mouse always stay in center?