A-ha! An audio stream! Is is one of the stereo formats? Poser's audio coding only plays nice with the original, single channel .wav format; any other format, or the multi-channeled .wav will cause all sorts of random problems. If you are doing animation with audio, and don't want to spend for the power packages like Premiere (although a careful shopping trip to ebay can get you a nice package at a decent price), you might want to check out the Magix software line (you can google the company). They do what I call 'beginner-ware'. Their audio and video apps do what they do, and cost about what a game costs (or a fraction more), so you don't sink a lot of money into them.