Image view problem

I am trying creating remember checkbox using image view with following code and is working fine for ios even in android the if else statements are working fine but remember_me.image = 'images/buttons/checkbox_not_ticked.png';' is working only once in android if i click it again its not changing the image from ticked to unticked. Please suggest bug

var remember_me = Titanium.UI.createImageView({
          image:'images/buttons/checkbox_not_ticked.png',
          width:Ti.UI.SIZE,
          height:Ti.UI.SIZE,
          left:20
        });
        row2.add(remember_me);
        row2.add(remember_me_label);
 
 
        remember_me.addEventListener('singletap', function(e) {
 
            if(!remember_me_var)
            {
                remember_me_var = true;
                remember_me.image = 'images/buttons/checkbox_ticked.png';
            }
           else
           {
                remember_me_var = false;
                remember_me.image = '';
                remember_me.image = 'images/buttons/checkbox_not_ticked.png';
           }
        });