I very iften have a problem with loud, harsh clicks that appear in movies but only after being produced. They cannot be heard in the project preview. They always appear in exactly the same points of video no matter how many times I produce it. The clicks seem to appear in places when sound is fading out (but I do not use volume lane in Power Director) the audio is pre produced in other software so the fades are "hardcoded". Only help is to remove part of audio track in such paces completly. Any idea what may be causing this and how to fix it?