Clicking noise when load XP100 zaptel driver (at boot time)

Hello

I’don’t know why…

but happens every time my asterisk boot

just when CentOs load “zaptel” driver (and “wcfxo” driver
for XP100), I hear a Clicking Noise on “PHONE” XP100’s port.

I know that I’ve a XP100 clon, but Noise makes unusable
this zaptel interface!

and today I’ve placed calls through XP100 without problems…

what happen ?

help please…

thanks in advance

andres.