sbs forward subdomain to other ip

Hello there,
I have a problem with the following and hopefully somebody can show me the right way.

I have a sbs2003 server (192.168.2.30)that is controling al my internet traffic. Now i have created an other development server (dev01) 192.168.2.11.

How can i config my sbs server so that i type dev.mydomain.com it will go to my dev server ?

thnx for the response.

greeeting, gerald