Jack doesn't respond to any sample rate setting

[edmund]

Hi Guys,

I installed Ubuntustudio on a few computers and I like it.
However in a Beta version Jack responded to changes in sample rate
settings and now that doesn't work anymore???

Is this known? Is there a solution or can it be that it works on one
computer and not on the other?
I need this feature, it is the main reason I switched to Ubuntu studio
in the first place.

Edmund