When I'm at the Soundpools section and I click on an instrument and then on a sound it plays the preview, but after I moved it to the editing section, and I start the playing, it doesn't give any sound, and if I try to play the instrument preview again, it not give sound. Sometimes it works, but just with one sound, after i put an another sound to the editing section that will not give sound, just the first one. But it's not happen often, usually none of them give any sound. How can I fix this? Please help