Where to enable NetBIOS broadcast over SSL VPN Tunnel

hello

on my Zywall 110 i used SecuExtender 4.0.5.0 for SSL VPN for remote access

with this configuration, when connected, i can access to remote drive with netbios name

with my new USG Flex 200 H, i use OpenVpn for SSL VPN for remote access

i can acces to remote drive only with IP adress

is there an option to enable netbios brodcast over ssl vpn ? i can't find the option in uOs

i use FW 1.30 and usg flex 200H is not used as a DHCP server (was same for zywall 110)

regards