AM4376: Login issue

Hi,

booting from SD card,

login I gave root but it is showing incorrect login.

please help us to resolve the below issue.

 _____                    _____           _         _   
|  _  |___ ___ ___ ___   |  _  |___ ___  |_|___ ___| |_
|     |  _| .'| . | . |  |   __|  _| . | | | -_|  _|  _|
|__|__|_| |__,|_  |___|  |__|  |_| |___|_| |___|___|_|  
              |___|                    |___|            

Arago Project http://arago-project.org am437x-evm ttyS5

Arago 2016.12 am437x-evm ttyS5

am437x-evm login: root

Login incorrect
am437x-evm login:

Thanks in advance