Router – Users not getting ip when connected through wifi,but wired connection getting ip in ddwrt router

The easiest way to set this up is to disable DHCP on the two wireless routers. Configure the wireless routers with static IP addresses on the LAN ports using the 10.0.10.0 subnet (IPs that aren't being used by DHCP or another device with a static IP). Set the WAN port for DHCP (or set it to another subnet that you'll never use).

Then unplug the cable from the WAN port on the wireless routers and plug it into one of the LAN ports. This will basically bypass all the routing function of the routers and turn them into access points. So your network will look something like this now.

10.0.10.1 - router to the Internet
10.3.10.2 - SBS server with DHCP enabled
10.0.10.3 - Wireless Router #1
10.0.10.4 - Wireless Router #2
10.0.10.100-10.0.10.200 - Workstations, servers, anything else that uses DHCP

Anyone using the wireless need need to get a new IP or reboot.

My office is setup this exact way.

My understanding has always been that the Windows DHCP service will shut itself down if it detects the presence of another DHCP server on the network. As a first step, I would suggest shutting down the Linksys DHCP component and using only the W2K3R2 server as the DHCP server. Make sure the server and scope are configured correctly and reboot one of the affected client computers and see what happens. In addition, you can install and run a packet capture program on the DHCP server (and client if needed) and capture network traffic to see what DHCP traffic is being receieved and sent by the server and the client.