Use of ethernet port stopped working

I use my Airport Express to connect to my existing wireless network (an Airport Extreme Base Station).
For over a year I've been using the ethernet port on the express to connect to my Playstation 2 so I can play video games over the internet and it's worked great.
Mysteriously, it recently stopped working. When I go into base station options (in the Airport Admin) it says "ethernet port always disabled when connected to existing wireless network."
I don't know if it said that before when it used to work, but I'm wondering if something changed.
I recently read through the forum and saw all the problems with the recent firmware upgrade and I seem to have successfully downgraded to 6.1.1 but the problem persists.
Does anyone have any ideas?
btw, I tried hooking my laptop to the Airport Express ethernet connection to make sure it wasn't the PS2 that was the problem. But that didn't work either.
Please help!!
Thanks,
Brad

I solved my own problem
The answer is in the FAQ at the following link if you're interested:
http://docs.info.apple.com/article.html?artnum=107454

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