Config WAN with multiple IP addresses

[A999]

EDIT: false positive! My NIC is broken and it's ok after replaced, sorry.

Hi, I'm sorry if my question is posted before, but excuse me because it is new config for me.

I'm running Pfsense 2.1.4 box and now ISP provides me a /29 subnet. My WAN interface is configured with PPPoE and after connected, WAN interface has blank IP address. I added Virtual IP and added NAT 1:1 rules.

Next, when I'm looking to route table, pfsense doesn't know what's default gateway to send to. I've tried to add new default gateway into WAN interface but I was told it's outside of WAN subnet.

So what can I do to connect Internet this way?

My setup looks like this: