Issue with DHCP using Cisco wireless adsl router, Cisco VPN, Windows server 2008 DHCP

Hi. i have an issue with using DHCP.

My current setup is
Cisco wireless router/adsl all in one, DHCP is disabled. This is then connected to
Cisco VPN Router, also DHCP is disabled. Then that is connected to the Winders server 2008 DHCP Role.
All computers connecting through the lan cable have no problems with accessing server or internet.
All wireless computers cannot find an ip address though.
I have set the adsl IP to
the vpn to
and the server dhcp is

what setting am i doing incorrect that allows wireless access to pickup the dhcp server. I have the
wan cable connected from the vpn router to port 1 on the adsl wireless router.

I have set the vpn to use static internet ip and pointing that to the modem.
on the wireless i have tried to use dhcp relay and pointing that to the vpn is the address
the vpn connects to the adsl

I need dhcp tp go through the server because they are running exchange server 2010.

Thank you
Who is Participating?
cybertechcomputersConnect With a Mentor Author Commented:
I ended up resolving the issue, i connected a switch to both devices, then point the adsl wireless to dhcp relay to the dhcp server. all went fine.

Thank you for you help
Istvan KalmarHead of IT Security Division Commented:
Please show the configs
cybertechcomputersAuthor Commented:
what do you mean by show config, are you after a screen print?

the models are

adsl wireless router, wag120n and the vpn router is
Don JohnstonInstructorCommented:
On the wireless router, you will need an "ip helper-address" assigned to the wireless interface.
cybertechcomputersAuthor Commented:
where do i find that, even though the wireless router is on a different ip range then the dhcp. wireless router / modem is and the dhcp is
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