write and read a text file

Hi I'm using Flash Cs5 exporting to Air 2

I can write a text file, but am struggling to read in back in. Here is my code so far. Any help would be greatly appreciated

import flash.filesystem.File;

import flash.filesystem.FileMode;

import flash.filesystem.FileStream;

var settingmike="mike57"

var filef:File = File.documentsDirectory.resolvePath("settings6.txt");

var streamf:FileStream = new FileStream();

streamf.open( filef, FileMode.WRITE );

streamf.writeUTFBytes(settingmike);

streamf.close();

filef = null;

streamf = null;

var fileff:File = File.documentsDirectory.resolvePath("settings6.txt");

var streamff:FileStream = new FileStream();

streamff.open( fileff, FileMode.READ);

streamff.readUTFBytes(settingmike);

//I want to see it in a text field called my_textfield

//my_textfield.text=streamff

thanks

KBN