Blocked when OpenVPN starts (solved)

I have a Linux Mint LMDE PC with Serviio 1.3.1.
If I load the OpenVPN client (writing "sudo service openvpn start"), Serviio stop work (isn't detect by other DLNA clients, but in the GUI, it say is running).
When I stop openVPN client, everything goes fine.
I don't see any interesting information on Serviio log, and It is bound to eth0 card (not tun0).
Any idea?
Thank you
If I load the OpenVPN client (writing "sudo service openvpn start"), Serviio stop work (isn't detect by other DLNA clients, but in the GUI, it say is running).
When I stop openVPN client, everything goes fine.
I don't see any interesting information on Serviio log, and It is bound to eth0 card (not tun0).
Any idea?
Thank you