yes i reboot :
So i try in command line to see what usbhost mounter :
root@proxmox:~# qm monitor 110
Entering Qemu Monitor for VM 110 - type 'help' for help
qm> info usbhost
Bus 1, Addr 2, Port 3, Speed 480 Mb/s
Class 00: USB device 07ca:a110, TD110
but on the virtual machine...