kxstudio and audacity

[ost]

i have some problem with audacity I can't select anything for my i/o of my firewire rme fireface 400 .
in fact nothing appears in the input and output in other distro like ubuntu studio i can select jack as input and output.
I use kx studio 14.04 and audacity is installed by kx studio .

I expect you can answer my questions thanks in advance

julien

PS:before i switch to kx studio i was on ubuntu studio and it work so??