ENDIAN Firewall - Two networks together - not working using blue zone and green zone

This should be a basic issue, but it has been giving me trouble for the last week. I have two subnets and two Endian's. I would like to connect the two subnets, but allow each subnet to have their default gateway as they have different internet providers. The network information is as follows:

Network A: 10.25.1.0/24
Default GW: 10.25.1.2
Endian A: two network cards - red zone for the internet, green zone for the LAN
Red Zone IP: <external IP>
Green Zone IP: 10.25.1.2
Endian A routing table:

Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
default * 255.255.255.128 U 0 0 0 eth0
<IP removed> * 255.255.255.128 U 0 0 0 eth0
10.25.2.0 10.25.1.219 255.255.255.0 UG 0 0 0 br0
10.25.1.0 * 255.255.255.0 U 0 0 0 br0
default <removed> 0.0.0.0 UG 0 0 0 eth0

There are only two Port Forwarding/NAT rules for this Endian. Both rules are bound to the main uplink to allow traffic in to a specific machine on the 10.25.1.0 subnet. There are no other firewall rules on this machine. No other firewalls are in use (outgoing, inter-zone, etc)

Network B: 10.25.2.0/24
Default GW: 10.25.2.2
Endian B: three network cards - one red zone, one green LAN, one blue zone
Red Zone IP: <external IP>
Green Zone IP: 10.25.2.2
Blue Zone IP: 10.25.1.219
Endian B routing table:

Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
default * 255.255.255.224 U 0 0 0 eth1
<IP removed> * 255.255.255.224 U 0 0 0 eth1
10.25.2.0 * 255.255.255.0 U 0 0 0 br0
10.25.1.0 * 255.255.255.0 U 0 0 0 br2
default <removed>       0.0.0.0 UG 0 0 0 eth1

This machine has two rules in the Port Forwarding/NAT firewall section binding to the uplink. The rules allow external communications with a server on the 10.25.2.0 subnet. There are no rules in the outgoing or VPN firewalls. There are rules in the inter-zone firewall and the system firewall.

The inter-zone firewall rules:
10.25.2.0/24-->10.25.1.0/24 any service allow
10.25.1.0/24-->10.25.2.0/24 any service allow
10.25.1.0/24-->10.25.1.0/24 any service allow
10.25.2.0/24-->10.25.2.0/24 any service allow

The system firewall rules:
10.25.1.0/24   <ANY>    TCP/10443
10.25.1.0/24   <ANY>    TCP/22
10.25.1.0/24   <ANY>    TCP+UDP/161:162

Any ideas on what may be going on here? I can't communicate (ping, http, any protocol) between 10.25.1.0 and 10.25.2.0.....