Logitech transporter no sound

Hello.
My transporter have no sound. LMS is version 7.9.2 with last update. Database is version SQlite 1.58 (sqlite 3.22.0) Operation system is Windows 7. The transporter connect successfully to my music folder and my squeezebox. com. He play the music file and the favorite radio station but no sound. I try the factory reset (xilinx reset), but dont work.
What is wrong?
Thanks.
Boris.