I have 2 further problems in delphix where this is concerned.

Firstly if I use jpeg or PNG images, the collision detection does not work, and more over, the sprites don't seem to even draw on the screen.

Secondly, If I use bitmaps for the animations and set transparency, there is still evident the colour that should be discarded. I set a picture animating 4 frames with colour, and black is the transparent, but still there is black outlining and even the box is sometimes visible