enabled WPA wireless security and broke ethernet configuration

[Tony K.]

I enabled WPA Personal wireless security on my wireless access point
(Airport Express).  I used the instructions on the following link to
enable use of WPA on my thinkpad.  It works for WPA, but I have lost
the ability to use my ethernet connection.

http://www.debianadmin.com/enable-wpa-wireless-access-point-in-ubuntu-linux.html

Previous to performing the updates, I beleive my ethernet was on eth0
and my original 802.11b connection was on eth1.  After following the
instruction above, the wireless connection now uses eth0 and I have no
ethernet.  How can I reconfigure to also have ethernet as an option?
Must I now configure eth1 for ethernet?

System: Ubuntu 6.10 on Thinkpad X40

Below is my /etc/network/interface config file before and after modifications:

Before:
--------------------------------------------------------------------
auto lo
iface lo inet loopback

iface eth0 inet dhcp

auto eth2
iface eth2 inet dhcp

auto ath0
iface ath0 inet dhcp

auto wlan0
iface wlan0 inet dhcp

iface eth1 inet dhcp
wireless-essid Affenberg
wireless-key s:

auto eth0

--------------------------------------------------------------------

After:
--------------------------------------------------------------------

auto lo
iface lo inet loopback

#auto eth1
#iface eth1 inet dhcp

#auto eth2
#iface eth2 inet dhcp

#auto ath0
#iface ath0 inet dhcp

#auto wlan0
#iface wlan0 inet dhcp

#iface eth1 inet dhcp
#wireless-essid Affenberg
#wireless-key s:

iface eth0 inet dhcp
--------------------------------------------------------------------
Thanks, Tony