Hmmm... probably that the Fax software needs to be running to use the Fax; if it goes into Hibernate then it pauses that information and you don't have a Fax. I imagine its been put in place by HP to stop you stopping your Fax without knowing about it.
A Knight is sworn to Honour. His heart knows only Virtue. His blade defends the helpless. His might upholds the Weak. His word speaks only truth. His wrath undoes the Wicked.