Hmmmm.

Check to make sure that your netmasks on all of the machines are correct. The 172 networks are /16 by default, so if you didn't specify, they will still be that way.

If it's not that, then you still have some sort of routing issue. Post back with the IP addresses w/ netmasks and all routes for all of your boxes. I've lost track of what state everything is in.
_________________________
Bitt Faulk