Routing Table Question -- Help appreciated

[datadan_1]

I blew it. I changed my routing table, and now I need to change it back, but I don't know what it should look like. RH6.2 route-v yields:

Dest GW Mask Fl M r u iface
10.10.12.16 * 255.255.255.255 UH 0 0 0 eth0
10.1.31.18 * 255.255.255.255 UH 0 0 0 eth1
10.1.31.0 * 255.255.255.0 U 0 0 0 eth1
10.10.12.0 * 255.255.255.0 U 0 0 0 eth0
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
default 10.1.31.19 0.0.0.0 UG 0 0 0 eth1
default 10.10.12.2 0.0.0.0 UG 1 0 0 eth0

I can ping to .12.16 from the .12 network.
I can ping to .31.18 from the gateway.
I can't ping from the 12.0 network to the .31.19 gateway?

HELP!
What should my routing table look like to facilitate traffic from the .31.0 network to the .12.0 network and vice versa.