Cannot access created file

I am creating a file in this fashion

Settings = Titanium.Filesystem.getFile(Titanium.Filesystem.tempDirectory,'ProductData');
            Ti.API.info("Created Settings: " + Settings.createDirectory());
            Ti.API.info('Settings ' + Settings);
             newFile= Titanium.Filesystem.getFile(Settings.nativePath,'Settings.txt');
 
            newFile.createFile();
 
            if (newFile.exists()){
 
                newFile.write('line 1\n');
                 Ti.API.info('newfile: '+newFile.read());
            }

and i have declared var Settings and var newFile in my alloy.js file.

I get an error when i tried accessing the same file in another controller like this

if (newFile.exists()){      
 
     Ti.API.info('newfile here    : '+newFile.read());
            }

I am using 3.2.3 GA. What exactly is going wrong here ?since i have decalred these in my alloy.js and it is suppoed to be global