Are there more Narnia movies to come?

I know Voyage of teh Dawn Treader is about to come out, but after it will there be other Narnia movies? Will they do Silver Chair and the Last Battle? And does anyone know if they're planning to go back and do Magician's Nephew and Horse and His Boy?

I thought I read somewhere that the movies weren't making enough money and they were going to stop making them :(