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