Coloring an entire animation

I am new to make animations and I'm using Photoshop 7 and ImageReady. I have made the animation and switch to Photoshop (making sure that the first frame is selected) and I color it, but then when I switch back to ImageReady to save it as a .gif file, only the first frame displays the coloring effects I've applied. I've tried everything I can think of to see if it will apply to all frames, including individually coloring frame 2 but it only affects frame 1.