I was doing a simple animation with sounds, effects and stuff. I put the sounds in separate layers when I put the sounds, they play perfectly but when I see the swf the sounds play before time. can someone help me?

Try and make the sfx in to stream instead of event.
If it's not in stream that is.

That should be because you have the sounds set on event, you have to set them in stream. Click the frame where the sound starts, then click properties and at the very right of it, there should be a little box with the word "event" if you click it, it should show up some options and one of them is called "stream"

but my sounds are set in stream