Does anyone actually have DHCP relaying working over VPN? Im trying to pass from a SBS2011 server via the 2830 to a win7 client, I've tried the built in client and smartvpn and it's having none of it.

Firmware 3.6.8.4_db_232201

LAN >> General Setup
DHCP Server Configuration = Disable server
Enable Relay Agent = ticked
DHCP Server IP Address = 192.168.0.4 (sbs)
DNS Server IP (primary/secondary) = blank

VPN and Remote Access >> PPP General Setup (When DHCP Disable set)
IP Address Assignment for Dial-In Users = 192.168.0.210

VPN and Remote Access >> Remote Dial-in User
Multicast via VPN = Pass
Subnet = LAN1

The VPN client is always assigned 192.168.0.211.

Am I missing a setting here, is it not possible or am I misunderstanding what should be happening?