I extracted an .mp3 audio file from a DVD, and am trying to edit out the voices at each end, but WavePad only plays the first 3:12 of the .mp3? I can open longer .mp3 files with WavePad, and it plays those. Any thoughts on why this is happening? I can play the 4 minute .mp3 file in Media Player, and it plays the whole thing. But when I open it in WavePad, it's truncated to 3:12?