adventure creator sprite problem

Hey need some help… I have imported my own sprites to create an animation. I have edited and named each sprite and applied the changes and want to drag them into the animator window but it won’t allow me. I have checked that the generic 2d sprites work and they do but it won’t allow my sprites to transfer over… how can I achieve this? can anyone advise me on this?

I have the same problem here. Scribble have you solved it?