Sample repeats by itself. How?

When I assign my sampled drum loops to the various pads (all pads set to note-on)...one of the loops when pressed and held repeats itself over and over...which reallly is a good thing. It's like automatically looping itself...all the other samples cut off after the sample ends...or I take my finger off the pad...what causes this...and it appears to be the sample, because I've assign it to different pads several times and still get the same thing...The sample is a drumloop...below is a link to the actual sample

http://www.sendspace.com/file/o8g1i7

when you press mode + pad 5 and go to that sample, is LOOP set to on ....change it to off if so