Songs not playing back the same as in OS 1?

I've loaded a few songs that I made from the older OS 1, NOW in OS2 they don't have the same efx, plus I've noticed some kit's have had issues where the samples like say on the kick drums, just cut out early? whats going on ?

depending on what you did in os1, those projects aren't gonna be compatible with os2
get her done in os1
start anew in os2

cool, thanks

this is where the whole "boot option" thing comes in handy