Calogero,
Do you have the song on your hard drive? If not, save it to your hard drive in Windows Media Player, then you can actually slow it down and hear the pattern yourself. It does not change the pitch so the chords you have for it will still be the same. To slow it down, do this:
When you're in Windows Media Player, at the top of the screen on the left, click on 'View' > Then click on 'Enhancements' > Then click on 'Play Speed Settings'. You should see the bottom half of your screen open up to display the speed settings. You can click on 'Slow', or actually move the button wherever you want with your mouse. Then you can hear the pattern and figure it out, for any song you want!