When is the hook AddonUnsuspended called?

Hi,

can anyone please write me when exactly is AddonUnsuspended (http://docs.whmcs.com/Hooks:AddonUnsuspended) hook called?

I thought it is called when when I go to Admin -> Clients -> Clients Profile -> Products/Services and that I need to change status of an addon from 'suspended' to 'active'. However, the hook is not called (I log my code to a log file so I'm sure it was not called.) It is interesting that AddonSuspended hook is called. I register both hooks in the same way so there is no problem in the hook registration of AddonUnsuspended.

Any thoughts?

Thanks!

This is called when the ususpended button is pressed or a service is automatically unsuspended when a client pays a past due invoice.