Thank you so much Jeremy and michael for responding!!!
I managed to get it right by exporting each channels separatly, then stretch them in soundtrack pro then mount them in compressor and then export them….
And it didn´t work when I try to send all the trax to soundtrackpro from fcp.
Yeah its a work around not a workflow…
Really not impressed by the expensive final cut suite, I think apple should stick to build computer.