[linux-audio-user] jack doesn't see my digital I/Os

i used jack with my Echo Gina24 (which has 2 ins, 8 outs) since today,
withous problems.
just today i bought an ADAT I/O box (Fostex VC-8).
in the Echo Mixer i can see, hear and control both analog and digital
channels.
but when i start jack, i only see two analog inputs, and eight analog
outputs.
where did my new digital channels go?

if i force jack to use 10 input channels and 16 output channels (VC-8
has 8 ins and 8 outs), jack says:

loading driver ..
apparent rate = 44100
creating alsa driver ...
hw:1|hw:1|256|2|44100|10|16|hwmon|hwmeter|soft-mode|32bit
control device hw:1
configuring for 44100Hz, period = 256 frames, buffer = 2 periods
ALSA: cannot set channel count to 10 for capture
ALSA: cannot configure capture channel
cannot load driver module alsa

note: i have to set Gina24 to receive external clock from the ADAT box
(its clock is 44.1k) in order to hear/capture the 8+8 digital channels.
why jack doesn't see the new inputs?

thanks in advance

-- 
ciao
Federico