Audio Rendering

In my Fotomagico presentation using 5.08 I have an audio soundtrack and also a movie clip which includes sound. I have set the sound on the separate soundtrack to reduce to almost nothing when the movie clip sound plays and the separate soundtrack to return to normal volume when the clip has finished. This plays as it should when within Fotomagico on the computer, and also when I make a ‘Standalone’ presentation. However, when rendered for Vimeo, iPhone, Apple TV or iPad the render does not reduce the level of the separate soundtrack when the movie clip audio is playing - they both play at full volume. I am using the latest Apple OS. Any help would be welcome.

Further to my post above. The version should read 5.0b58.