Can a Rogue Coup De Grace twice against a sleeping opponent in a single power?

Question

In a recent battle my rogue was in, I knocked out a wizard with one of my favorite powers.. uh.. Knockout. The text says:

Hit:...and the target is knocked unconscious (save ends). If the unconscious target takes any damage, it is no longer unconscious.

Deciding I didn't like sleeping Wizards I then unleashed my other favorite Circling Predator:

Hit: 1[W] + Dexterity modifier damage.
Effect: You can shift 1 square and must end adjacent to the target. Then make a secondary attack against it.
Secondary Attack: Dexterity vs AC
Hit: 1[W] + Dexterity modifier damage, and you gain combat advantage against the target until the end of your next turn.

The group all agreed that I would get a Coup De Grace on the first hit, for sure. What we weren't sure about is whether the second attack of the Circling Predator power allows for a second Coup De Grace. My gut instinct is no, but I was curious what the rules say about it.

Can you perform two Coup De Grace's against an unconscious opponent who wakes after taking damage, if it's with a single power?

Answer 1

I would think the answer is no, unless once awake the target remains in a status that's susceptible to CdG - such as tied up.

Answer 2

I would say no because if coup de grace succeeds, the creature is dead.