Don't fret Scorpian! Your answer is very simple really. In a regular timeline based animation program what you're doing would work. However this isn't the case with image ready because it's not working with a timeline (that would make too much sense)
What you have to do is think of image ready as animation flip book. Before the miracle of computers, animation had to be done frame by frame!! Such is the case with image ready. In order to make your disc spin, you must create individual frames that are spun a little bit. Then you can plop them in order in Image Ready and animate it. Simple as that!
[bustagut]
KOP
btw, your center is a little off
rotation in image ready 
(and to get the center sorted 
Linear Mode
