Image unable to display (Android)

I have following code

Titanium.UI.setBackgroundColor('#FFFFFF');
 
var homeWindow = Titanium.UI.createWindow({
    backgroundImage: 'HomeBg.png',
    exitOnClose: true
});
 
var view1 = Titanium.UI.createView({
    backgroundColor: 'red',
    height: '50%',
    width: '55%',
    top: 'true',
    left: 'true'
})
 
homeWindow.add(view1);
 
var view5 = Titanium.UI.createView({
    backgroundColor: 'black',
    height: '50%',
    width: '50%',
    bottom: 'true',
    right: 'true'
})
 
var bookImage = Titanium.UI.createImageView({
    url:'Book_icon.png'
    // image:'Book_icon.png' Also not working
});
 
view5.add(bookImage);
 
view1.add(view5);
 
homeWindow.open();

This code is not displaying the image in Image View.

Background Image is showing properly. And there is also Book_icon.png with the HomeBg.png.

I have tried with image as well. that is also not working.

If you are devloping on windows - turn off fast dev and it will show.

http://developer.appcelerator.com/question/120444/how-to-disable-fastdev

turning it off worked for me as well

Why position properties (top, bottom, left, right) are set to string "true"? They should be string/float/integer number (42, '11%', ...) and not true or false (not even string "true" or "false").