The problem is this:
Before, when I used Flash CS3, I could hit enter on any frame and the animation with audio was reproduced very well, but now that I have the CS6 I have to use the preview and see the hole the animation from the beginning to see the audio at the correct time, instead of just going to the actual frame I want to start from and play it
If somebody understood me, pliz, help me

Edit: solved!!
For all the human kind who has this problem, you have to go to the frames were the audio is, go to "properties" and in "Sync" u must select "stream"

If a mod could move this to tutorial it´ll cool

Special tnxs to camila

Probably the sounds are set in "event". Click the frame where the audio starts, then click in the tab bellow that says properties, and change the event to stream.

Just wut i did :3
Epic camila is epic