EFW Support

Hi,

this is my configuration:

PC1 ------|
PC2 ------|
PC3 ------|                   "Site 1"                                          INTERNET                                "Site 2"                 
               |-------- LAN------ FW ---- WAN .... *_____VPN-Tunnel_____*..... WAN ---- EVPNCLT+FW --- LAN--- |
  |---------|                           |                                                                                                                           |--- PC1
  |                 |------ DMZ1---|                                                                                                                           |--- PC2
EVPNSRV ----|                                                                                                                                                  |--- PC3

LAN "Site 1":
192.168.2.0/24

LAN "Site 2":
192.168.0.0/24

DMZ1 "Site 1":
192.168.5.0/24

EVPNSRV "Endian":
Green: 192.168.2.58 Red: 192.168.5.10
route -n
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.5.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
192.168.2.0     0.0.0.0         255.255.255.0   U     0      0        0 br0
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 br0
0.0.0.0         192.168.5.1     0.0.0.0         UG    0      0        0 eth1
"OpenVPN Server Configuration:"
OpenVPN Server enabled: YES
IP Pool: 192.168.2.1 - 2
Port 1194/UDP
Block DHCP responses coming from tunnel: YES
Account / Use this firewall as default gateway: NO

EVPNCLT "Endian":
Green: 192.168.0.230 Red: 192.168.4.2
route -n
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.4.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 br0
0.0.0.0         192.168.4.254   0.0.0.0         UG    0      0        0 eth0
"OpenVPN Client Configuration"
bridged   
block DHCP responses coming from tunnel:  YES

i have established VPN connection beetween two Endian Firewall in Net2Net Mode, but i have a problem, because the VPN Server in "Site 1" is not the Firewall.  So i located VPN Server behind the FW connected with the Red Interface to DMZ1 and GREEN Interface to LAN.
On "Site 2" FW i establish the connection with VPN Server and the ping 192.168.2.x from "Site 2" PCn is ok and viceversa (on PCs of "Site 1" i run route add -net 192.168.0.0 netmask 255.255.255.0 gw 192.168.2.58 eth0.
If i try to connect to "Site 1" PCs from "Site 2" via NETBIOS there is problem, but if i connect via NETBIOS typing \\192.168.2.x there is ok. What is problem????
I think the option block DHCP responses coming from tunnel is a problem, but i must enable this option because there are 2 DHCP Server, one on "Site 1", and another on "Site 2".
How i solve this problem???

Thank you