Volumio can't load songs from my Synology mounted


I use Volumio since some year with a hard disk with no trouble

Now i try to use my Nas Synology 218 with volumio 2
My Nas is correctly mounted on volumio via NFS (260 GO) but when i scan or update my music, nothing happened. Yesterday i wait all along the day, but nothing appears in my library.
Do you have an idea to help me ?
Thank you and sorry for my English (I am French)
Best regards,