Moving Layers/Frames

Hello. Can anyone advise me on how to move individual Bitmap frames/layers without moving all the following/previous frames/layers. I am working on a walk cycle made up of 8 PNG files created in photoshop. Currently the character is walking across the page left to right. I want to create a walk that remains in the same spot, moving the background to create the movement. Each time I try to move one layer/frame all the other layers/frames move at the same time. The black circle which selects all layers is not activated and all 8 frames/layers are on the same bitmap layer. Thanks