I tried reproducing the same on a Flash CS 5 set up.
I imported a 5 min sound clip. I edited the sound clip withing Flash and set the start point and end point to around 2.5 seconds
I tested the movie and it worked just fine.
If possible could you try editing another sound clip in flash and let me know if it works?
otherwise please send me the sound clip for testing
[[[I tried emailing a reply with the files, but it just posted the reply here]]]
In the FLA file, the "Shoes" button has an attached sound, where I used the Edit Envelope option to remove "Dead Air" at the beginning of the sound clip.
The "Home Furnishings" also has a sound file attached, but that one has not been edited.
When you test the movie in flash player and roll over the shoes button, the sound is cut off half way through the word "apparel".
It seems like editing the in point of a sound is what is causing the problem. Editing the Out point does not have the same effect.
Is there some way to upload test files to these forums?