Custom CheckBox drawable wird nicht richtig dargestellt

<CheckBox
                        android:id="@+id/checkBox1"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                      
                        android:layout_marginTop="10dp"
                        android:gravity="center"
                        android:textColor="#dcdcdc"
                        android:button="@drawable/checkbox_selector"
                        
                        android:text="Einstellungen speichern" />



<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="true" android:drawable="@drawable/white_color_box_with_tick" />
    <item android:state_checked="false" android:drawable="@drawable/white_color_box_without_tick" />
</selector>

  ACTIVITY.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

     DisplayMetrics metrics = new DisplayMetrics();
     WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
     wm.getDefaultDisplay().getMetrics(metrics);
     float yInches = metrics.heightPixels/metrics.ydpi;
     float xInches = metrics.widthPixels/metrics.xdpi;

     Globals.LAYOUT_HEIGHT =  metrics.heightPixels;
     Globals.LAYOUT_WIDTH  =  metrics.widthPixels;
     Globals.LAYOUT_INCH   = (float)Math.sqrt(xInches*xInches + yInches*yInches);


     //  Fitting-Faktor von Background - Image berechnen
     final BitmapFactory.Options options = new BitmapFactory.Options();
     options.inJustDecodeBounds = true;
     BitmapFactory.decodeResource(getResources(), [drawable_id_meines_backgrounds],options);
     int real_bitmap_width = options.outWidth;
     int real_bitmap_height = options.outWidth;
     Globals.LAYOUT_ZOOM_X = ((float)Globals.LAYOUT_WIDTH  / (float) real_bitmap_width)  ;
     Globals.LAYOUT_ZOOM_Y = ((float)Globals.LAYOUT_HEIGHT / (float) real_bitmap_height) ;

int breite = 150;
int position_X = 0.2F;
int position_Y = 0.32F;

ImageButton b_close        = (ImageButton) findViewById(R.id.image_button_close_slider);

android.view.ViewGroup.LayoutParams b_close_params = b_close.getLayoutParams();;
int button_size_real      = (int) ((float) breite * (float)  Globals.LAYOUT_ZOOM_X);
int button_size_middle    = (button_size_real/2);
b_close_params.width  = b_close_params.height = button_size_real; b_close.setLayoutParams(b_close_params);
b_close.setX((int) ((position_X) * Globals.LAYOUT_WIDTH) - button_size_middle);
b_close.setY((int) (position_Y) * Globals.LAYOUT_HEIGHT) - button_size_middle);

public class ExtendedImageButton extends ImageButton
{
   public static final  float CENTER = -9999.12345F;

    public static Context con;

    public ExtendedImageButton(Context context)
    {
        super(context);
        con = context;

        // TODO Auto-generated constructor stub
    }

    public ImageButton create (float x,float y,int size,int resource,int id)
    {
        ImageButton b_button = new ImageButton(con);
        b_button.setImageResource(resource);

        RelativeLayout.LayoutParams i_back = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
        int button_size_real      = (int) ((float) size * (float)  Globals.LAYOUT_ZOOM_X);
        int button_size_middle    = (button_size_real/2); i_back.width  = i_back.height = button_size_real;
        b_button.setLayoutParams(i_back);

        b_button.setScaleType(ScaleType.CENTER);
        b_button.setAdjustViewBounds(true);
        b_button.setBackgroundColor(Color.TRANSPARENT);
        b_button.bringToFront();
        b_button.setVisibility(View.VISIBLE);

        b_button.setTag(id);
        b_button.setId (id);
     

        if (x == CENTER)
        {
          b_button.setX((Globals.LAYOUT_WIDTH / 2) - button_size_middle);
        }
        else
        {
         b_button.setX((int) (x * Globals.LAYOUT_WIDTH));
        }

        if (y == CENTER)
        {
         b_button.setY((Globals.LAYOUT_HEIGHT / 2) - button_size_middle);
        }
        else
        {
          b_button.setY((int) (y * Globals.LAYOUT_HEIGHT));
        }
        return b_button;

    }

int SIze_of_Button = 250;

//  größere  elemente z.b. auf kleinen Displays -------    (Damit der Finger auch was trifft)
if (Globals.LAYOUT_INCH < 6.5F) Size_of_Button = 400;


ImageButton  b_next = new ExtendedImageButton(this).create(0.04F, 0.75F, Size_of_Button, R.drawable.media_next, BUTTON_NEXT);
            b_next.setOnClickListener(onButtonPressed);