Delay in looping movie after first run

Hi, I’m pretty new here and very new to Flash and expecially Actionscript, so I hope you can forgive me if this problem seems to have an obvious solution I can’t spot since I have a hard time figuring out the effect different things have on flashdocuments.

Here the question goes:

I am making a “simple” slideshow. An image split up in 4 different parts/movieclips loading at different points with 4 specific timers thereby changing the image shown.

My problem is that the first time I run through the animation as an swf it goes smoothly. But when it loops, all but the first movieclip with a timerdelay of 0 starts to load slowly, making the complete movie lag.

I am not sure what causes this. Inside each movieclip all the images are fading with a motion tween, therefore all images are in the library as movieclips. But why does that only slow down the swf after the first run?

Tried looking through the forum for similar issues, but all other threads seemed to comprise only constant lag and not “more lag the longer the movie runs”

I hope someone here can help out, eventhough I’m kind of a newbie :confused: