External SWF animation becomes slow onTouch

I have a image and a swf on screen loaded by SWFLoader.

swf animation is 30fps and application fps is also 30.

The image has a onTouchEnd event which.

If I touch the image for 4-5 times while the swf is animating, the swf gets very very slow and ultimately stops animating.

Note: if I do not touch, the swf runs perfectly without problem.

Any help ?

Platform: iOS 5.0, iPhone 4. Flash Builder 4.6