scanning on port b : not finding any channels

[frederikict]

hi,

i have 2.3 running with a dual tevii s482 dvb-s2 card.
port A : 19.2e
port B : 23.5e
when i scan on port A : i get all my channels
wheen i scan on part B : it doesn't find a thing ....

i have been running tvheadend for 5 months without problems.
is this a driver problem ?

ps: i am running argustv on a xen domU