transparent installation not allowing clients on internet

I'm setting up untangle for the first time. I'm testing for a client installation.

The goal is to have set it up in transparent mode.

There is already a router in place (192.168.200.1)

I've setup the untangle box, a winxp, and a win7 box in vbox.

The untangle has interface 1 bridged to my network card, interface 2 is connected to an internal network called "intnet"

The windows xp and win7 have 1 interface each, and are both connected to the "intnet" internal network

Both machines end up receiving an ip from the dhcp server (192.168.200.1), they cannot get internet, and cannot ping the untangle box or the router. They cannot access the untangle or the router gui in a browser. They cannot ping 8.8.8.8 either.

The untangle box can see the internet just fine. All of it's tests pass, and I can browse to websites

I've played with the untangle box quite a bit, and I've gone back to factory settings a few times also, but I don't know what else to do to troubleshoot this.

Any help?