DHCP Relay to Windows Server 2003

I have the Mikrotik RB750 configured using PCC to share to wan connections to my LAN.
The LAN is broken up into smaller VLANS, 172.17.0.0/24 is my backbone, where the servers are located.
172.17.8.0/24 Vlan 1
172.17.6.0/27
172.17.6.32/27
172.17.6.64/27
172.17.16.0/24
172.17.24.0/24
The Mikrotik LAN ip is 172.17.0.8
I have a Windows 2003 server which gives out DHCP to each of the vlans by way of IP helper or relay. server ip 172.17.0.121

If I put the gateway of the Server as 0.8 clients stop getting dhcp addresses. I tried to setup DHCP relay on 0.8. it shows it is getting DHCP requests but does not reply. I am new to the Mikrotik routers so am a little lost and cannot understand why this does not work. If I put back the cisco unit it works fine.

I have setup the MT router to log errors on DHCP. It shows the requests coming through.
This is an error “received inform from “mac address” with unknown giaddr 172.17.24.1”

Any suggestions