Noel is correct that this is more suited for RealBand. Syncing an audio file can be difficult, especially if the tempo is slightly different anywhere in the song. If you work your way through all the changes again, try Rendering the song. If you want the audio included, be sure to check that option in the Render dialog. I have lost frozen tracks when changing the style.

A couple of suggestions:

- If you are using a style with RealTracks, try a similar Midi style and add RealTracks manually.
- There is a .bt1 file that is created which syncs the audio to the song. Try deleting that and re-playing song. A new .bt1 will be created.
- Your drums may be starting on the upbeat. Some RTs do this. I don't recall RDs doing it but possible. Play around with the Count-in settings.
- It is possible that the song file is corrupt. If it is easy, copy your chords/melody etc to a new song.

Hope some of this helps

R