Scrolling Image problems - Jittery?

I have made a scrolling picture slide show of sorts, but have an issue with it. It is made up of 10 images and scrolls from left to right. It doesn’t have any mouse over functions and is just for visual. I made a movie clip made up of all the pictures and added a motion tween. Then I made another instance of the same movie clip and added it to the end of the first so the images repeat.

The problem I’m having is that each of the images inside the movie clip have some sort of “jitter” on them and they don’t scroll across smoothly. I don’t have any action script in the file other then telling it to go to a certain frame to repeat.

If anyone has any ideas on how to “smooth out” the animation it would be greatly appreciated.

Also its set at 30 FPS