warping shuts off when I adjust the tempo!!!! Help!!

[Jaybone]

Strangest thing.....when I change the tempo all of my samples lose their warp and loop settings, making them impossible to work with on the fly. Tried everything, but can't figure out why. I'm running Live 4.1 on a fully updated Mac ibook G4. Never had a problem until now......When I open a new set the default tempo (120) keeps everything moving fine, but as soon as I change it it all goes wrong. Anyone have some ideas as to what I should do????