Macromedia Flash is with a delay in the preview

I was using flash 8 normally, but then I had to restart my laptop and when I open it again I re-opened the project I was working with, which had audio, but, when I pressed enter to play the animation in the preview, the audio and the video it was very 'glitchy' in the first seconds of the project, this makes extremely hard for me to make timing , help?