"If you are not focused 100 per cent on the job you will have massive problems," he raged to the Birmingham Evening Mail.
"At the moment we are trying to come up with a vehicle to win games in the hardest league in the world.
"But we have two or three not singing from the same song-sheet. Any team with that will struggle and it will doubly difficult for one who has come up from the First Division to the Premiership.
"If we go into the division like this we will have no chance. If we play in that manner and lose to Bristol Rovers, what's going to happen when we play some of the top teams we are going to face?"