sprite animation not playings

so i created a new object from create -> other ->sprite and added an animation component to it. I then selected about 18 png files, imported them and change there types to sprites 2d\guo, and added them to the animation editor, saving the quick animation and then attaching the animation to the animation component and set to play automatically leaving the play as continues, and attaching the idle sprite cell the actual sprite component for when I don't want the animations playing. only problem is that the animation never plays and I am not sure why, even adding a quick script to the start of the object to play the animation just leaves it there sitting still.