No DNS on Opt1 interface

[jarred1234]

I am currently using 1.2 with three NICs.  the Wan goes to the dsl modem, the Lan goes to the wired lan, and the the opt1 goes to the wireless network on a DMZ.  I would like a proxy server for both networks.  The problem is that I can not browse the web on the opt1 interface because the DNS is not working.  I can ping the ip address fine but I can't get to the page when using the url.  I need to know if there is a static route I need set or set a firewall rule or create another dns proxy service.  Any help would be great.