Animation Stroller

I have a stroller clipart. I imported to the image to the flash stage and try to make the 2 wheels spin as the timeline goes, but it does not work. I’m using Flash CS3 Pro. I give it a timeline and set the rotate to CW, the whole stroller spin instead of the “WHEELS” spin only. That’s what I wanted. I wanted the stroller wheels spin going from right to left and then left to right, then it stops without looping. How do you set the action script to stop for the stroller only. I have 2 or 3 different animations. If I set the action script to stop(); in the action frame, all the anmations stop. I just want the stroller to stop in a certain point. Please advised me what to do and show me step-b-step if you have a chance. This is my first animation. Below is the link to my site.
www.alinanguyen.com/test/