How to set disk quotas for different users ??

Hello, I need to know how exactly can I set set disk quotas for different users
I tried to do it from CWP but only one user from 3 I have (3 accounts) has quota
here are the screen caps




only the first user i created has quota and i tried applying packages and editing users
but i always get this : "Disk quotas for user xxxxxxx (uid 501): none

please help me