Harry Potter and the Prisoner of Azkaban Q&A

on the level "neville & the Ghoul" how does ron get rid of those ghost like creatures? i get through the first round but by the time i get to the second round i die from them flinging fire at me...how do i pass the level?

Once you get your new power and are able to use it with Ron, how do you defeat the hinky punks? Nothing happens when I use it!