Dual NIC confusion in Win 2003

I recently moved our websited to Windows 2003 Server Web Edition. The previous server had 2 NIC’s with a presence on both the LAN and WAN. Under 2003 the websites will not function with the internal LAN NIC enabled.

How can set this webserver to have both a LAN and WAN presence? I understand there are some security concerns with this, but the current setup has fouled up how we update our websites.

Thanks,

Matt