iPhone OpenGL ES background texture problems

I am trying to set a .png file as my background in OpenGL, with the hopes of drawing more objects on top of it. I have an image that is a 320x480 RGB image. I setup my vertices, as follows:

- (void)drawView:(GLView*)view;
{
    static GLfloat rot = 0.0;

    glColor4f(0.0, 0.0, 0.0, 0.0);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glEnableClientState(GL_VERTEX_ARRAY);
    glEnableClientState(GL_NORMAL_ARRAY);
    glEnableClientState(GL_TEXTURE_COORD_ARRAY);

// Vertices
    static const Vertex3D vertices[] = {
    {-1.0,  1.0, -0.0},
    { 1.0,  1.0, -0.0},
    {-1.0, -1.0, -0.0},
    { 1.0, -1.0, -0.0}
};

// Normals
static const Vector3D normals[] = {
{0.0f, 0.0f, 1.0f},
{0.0f, 0.0f, 1.0f},
{0.0f, 0.0f, 1.0f},
{0.0f, 0.0f, 1.0f}
};

// Tex Coords
static const GLfloat texCoords[] = {
    0.1875f, 0.03125f, // image is 320x480, but texture is 512x512. Image is offset by 96x32
    0.1875f, 0.96875,
    0.8125f, 0.03125f,
   0.8125f, 0.96875
     };

    glLoadIdentity();
    glTranslatef(0.0, 0.0, -3.0);
glScalef(320.0f / 512.0f, 480.0f / 512.0f, 1.0f);

    glBindTexture(GL_TEXTURE_2D, texture[0]);
    glVertexPointer(3, GL_FLOAT, 0, vertices);
    glNormalPointer(GL_FLOAT, 0, normals);
    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

    glDisableClientState(GL_VERTEX_ARRAY);
    glDisableClientState(GL_NORMAL_ARRAY);
    glDisableClientState(GL_TEXTURE_COORD_ARRAY);

    static NSTimeInterval lastDrawTime;
    if (lastDrawTime)
    {
        NSTimeInterval timeSinceLastDraw = [NSDate timeIntervalSinceReferenceDate] - lastDrawTime;
        rot+=  60 * timeSinceLastDraw;                
    }
    lastDrawTime = [NSDate timeIntervalSinceReferenceDate];
}

-(void)setupView:(GLView*)view
{
    const GLfloat zNear = 0.01, zFar = 1000.0, fieldOfView = 45.0; 
    GLfloat size; 
    glEnable(GL_DEPTH_TEST);
    glMatrixMode(GL_PROJECTION); 
    size = zNear * tanf(DEGREES_TO_RADIANS(fieldOfView) / 2.0); 
    CGRect rect = view.bounds; 
    glFrustumf(-size, size, -size / (rect.size.width / rect.size.height), size / 
           (rect.size.width / rect.size.height), zNear, zFar); 
    glViewport(0, 0, rect.size.width, rect.size.height);  
    glMatrixMode(GL_MODELVIEW);

    // Turn necessary features on
    glEnable(GL_TEXTURE_2D);
    glEnable(GL_BLEND);
    glBlendFunc(GL_ONE, GL_SRC_COLOR);

    //glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);  

    // Bind the number of textures we need, in this case one.
    glGenTextures(1, &texture[0]);
    glBindTexture(GL_TEXTURE_2D, texture[0]);
    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); 
    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); 



    NSString *path = [[NSBundle mainBundle] pathForResource:@"texture" ofType:@"png"];
NSData *texData = [[NSData alloc] initWithContentsOfFile:path];
    UIImage *image = [[UIImage alloc] initWithData:texData];

    if (image == nil)
        NSLog(@"Do real error checking here");

 GLuint width = CGImageGetWidth(image.CGImage);
     GLuint height = CGImageGetHeight(image.CGImage);
     CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
     void *imageData = malloc( height * width * 4 );
     CGContextRef context = CGBitmapContextCreate( imageData, width, height, 8, 4 * width,   colorSpace, kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big );

    // Flip the Y-axis
    CGContextTranslateCTM (context, 0, height);
    CGContextScaleCTM (context, 1.0, -1.0);

    CGColorSpaceRelease( colorSpace );
    CGContextClearRect( context, CGRectMake( 0, 0, width, height ) );
    CGContextDrawImage( context, CGRectMake( 0, 0, width, height ), image.CGImage );

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, imageData);

    CGContextRelease(context);

    free(imageData);
    [image release];
    [texData release];

    glEnable(GL_LIGHTING);

    // Turn the first light on
    glEnable(GL_LIGHT0);

    // Define the ambient component of the first light
    static const Color3D light0Ambient[] = {{0.4, 0.4, 0.4, 1.0}};
glLightfv(GL_LIGHT0, GL_AMBIENT, (const GLfloat *)light0Ambient);

    // Define the diffuse component of the first light
    static const Color3D light0Diffuse[] = {{0.8, 0.8, 0.8, 1.0}};
glLightfv(GL_LIGHT0, GL_DIFFUS开发者_Python百科E, (const GLfloat *)light0Diffuse);

    // Define the position of the first light
    // const GLfloat light0Position[] = {10.0, 10.0, 10.0}; 
    static const Vertex3D light0Position[] = {{10.0, 10.0, 10.0}};
glLightfv(GL_LIGHT0, GL_POSITION, (const GLfloat *)light0Position); 
}

when I run the code it shows as less than a full screen grey box, instead of my image. Any ideas what I am doing wrong ?