it sounds like you are exporting the simple beat, but you need to export the whole song, or song segment for it to work properly in this case
that crash sounds like its not ending at before the last beat of the loop, which is ok, but when you render just one round of the pattern instead of the song, it will be longer, and wont over lap the way it should ... the way its working now.
what you need to do, is set up your loop in FL (Fruity Loops) the way you want it, and then use the "playlist" function in FL to build your song the way you want it, then export it. the way that FL works, even if the loop doesnt end before the last beat of the pattern, it will automaticaly overlap it on the next round of the loop, so it all works out like you want it to.
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lemme know if it helps