The way to get out of a mental block is to change the team around and try something new. First and foremost, we can change the formation or change around the personnel. Doing the same thing over and over again only compounds the block, even if the tactical approach isn't the reason behind the failures (although I think they are). Hell, remove the armband from Buffon for all I care, some times the more change to inspire a team is the only way that wakes them up.
So either way, change the fuucking formation.