Default [Q] how can i go back to 4.3BMI9 stock rom

im running 4.4.2 leaked firmware right now the baseband N900AUCUCMLG for note 3 at&t. my question is how can i go back to stock 4.3 .. i tried downloading md5 tar file of 4.3 but when i tried to flash it via odin when i click start it just stopped (0 successful/1 failed) please help me