After Effects timeline(?) question

Newbie @ After Effects & have a AE project that I am ready to export into .SWF file to insert into a website. The issue is that I want the animation of this file to go from the In point @ 0:00 to the Out point @ about 06:23, but then return back to 0:00. In essence, once I've exported out to the .SWF (while using loop option), the animation will display a 'back and forth' kind of result, while the loop option will keep the entire .SWF file running continuously. Not sure if this is just a keyframing issue on timeline or In/Out point or what. Would try searching in the forums, but I am not precisely certain what I would call I'm trying to do. Any input would be appreciated...
Thanks!

Sorry for the confusion. I meant that when I exported out the .aep to .swf, I selected the Loop Option. However, what I was trying to accomplish (and did so) was to have the animation run the 07:00 seconds of the timeline from the In point to the Out point, then reverse and run the timeline backwards back to the beginning In point at 0:00. After exporting to the .swf file, it would simply loop and continue over and over. What I ended up doing is adding another composition of the footage, then reversing the comp and in effect having a 0:00 - 14:00 seconds total animation. Once that appeared smoothly, upon exporting to the .swf file, it ran as expected, while looping and running over and over. Sure there is a much easier way to accomplish this, but that is what I came up with as a resolution.
Thanks for commenting...