No.
LSJ May 3, 2007
http://groups.google.com/group/rec.games.trading-cards.jyhad/msg/17888af5f04473aa
> If a vampire attempts to employ Cry Wolf but is blocked and then plays
> Change of Target, does the vampire still go to torpor since he was
> blocked?
Yes.
The action is ended, not canceled.
If it was a Force of Will, the agg damage would still be applied after
Change of Target, too.
LSJ September 27, 2002
http://groups.google.com/group/rec.games.trading-cards.jyhad/msg/88f3240c6c4d8181