Need Guideline to find reasons of rejection "Employee Handler with Finance Management"

I am newbie to start work on codecanyon ,i have wrote a PHP script by using code-igniter framework about Employee management with debit and credit ,
it has rejected by codecanyon review team without telling any reason as hard ,
please i need your guide to find the reasons of rejections ,help to improve as well ,

for demo: PMS

Login Credentials :: Username=‘’ | Password='password’

please visit demo and stimulate functionality to guide me about my mistakes cased of rejection , i shall be thankful for all your kindness ,thank you.