Bridging with PPPoE Interface

I am having an issue bridging two NICs on Linux Firewall. Here are the
details...

* OS is Fedora Core 3
* Two physical NICs (eth0 and eth1)
* eth1 is setup to do PPPoE using the adsl-setup script (outbound
connection works fine)
* eth0 is assigned 0.0.0.0 address per bridging instructions found here
http://www.faqs.org/docs/Linux-HOWTO...ter-HOWTO.html

The problem is once the briding is created by adding the second
interface (eth1) the PPP0 connection drops after a few seconds. It is
as if the bridging inteferes with the control of the eth1 interface by
ppp daemon and pppd detects that there is no longer a connection to the
ppp concentrator and drops the connection. This is evidenced by the
following messages in the messages file:

Dec 29 10:49:21 cairo pppd[6527]: No response to 3 echo-requests
Dec 29 10:49:21 cairo pppd[6527]: Serial link appears to be
disconnected.
Dec 29 10:49:21 cairo pppd[6527]: Serial link appears to be
disconnected.
Dec 29 10:49:27 cairo pppd[6527]: Connection terminated.

The question is whether there is a way to bridge these two interfaces
when one is a PPPoE link and the other is the internal network? It
seems like this should be doable. Any help is appreciated.

Thanks,
Ivan