Napster problem on LMS

Hello everyone
I installed LMS on RPI2 with Debian.
Here are the informations of my build:



Logitech Media Server Version : 7.9.1 - 1521477787 @ Mon Mar 26 14:30:20 CEST 2018
Système d'exploitation : Debian - FR - utf8
Architecture de la plate-forme : armv7l-linux
Version de Perl : 5.20.2 - arm-linux-gnueabihf-thread-multi-64int
Audio::Scan : 0.95
Version de la base de données : DBD::SQLite 1.34_01 (sqlite 3.7.7.1)





I have a problem that I can not solve.
Impossible to make Napster work.
The Napster 1.0 plugin is installed under LMS.
I installed the Napster app with MySB.com
When i use Napster app i have a message : " This deck does not support Napster. You must have Squeezebox2 or higher."
How can I do?
Something I forgot?
After more than 4 hours trying I need a lot of help.
Thank you in advance.