Ableton question

I'm working on mixing one of the tracks of "Bush of Ghosts". When I load the tracks into Audacity, the tempo remains the same and all tracks start at the same time. This has no impact in the tracks being out of sync. However, when I load the tracks into Ableton for some reason I'm losing the sync and all tracks start randomly creating a bit of a mess. I don't know if this is clear enough, let me know if you need me to clarify the question or if you can help. Thanks!