emusonacid! legacy

Oh hai, I've browsed this forum for a while (since I got my sampler anyway), things look pretty sweet. I've gotten around the EOS quite well (my e4x only supports 3.00b at highest), but this thing got me stumped. I've recorded a nice reese sound into the sampler, but when I try to loop it, it just plays it as a one-shot. Previously I've looped a drum break succesfully but this thing just doesn't want to carry on playing. I'm in the 'edit sample' menu, Tools1 has the loop function and i set it correctly, start and end positions at zero crossings, but when I press OK and set the crossfade it wont loop the sample. I've tried it also without the crossfade but no luck. Is there some bug or some special sample property that doesnt allow looping or what am I missing here? The drum break I've looped does work. It loops even in the sample edit menu via the audition button.

Sample Edit > Tools 1 > Loop Type > On