Help with sound issues

HI, I live in Italy and have been using a magic jack. Until recently it worked fine, however now when some1 calls us we cannot hear them but they can hear us. We tried the jack at a friends house and it worked fine. So it must be something else, what we do not know. The sound works normally on all other things. We have updated drivers, looked at all the sound options, and countless other things. Any advice or suggestions would be very helpful.