802.1x over ethernet and airport impossible together ??

I am connected to my University network (and to the internet) through a 802.1x network (Through Ethernet, not Airport).
I have an iPod Touch with which I want to connect to the Internet.
I went under Sharing, and created a Wireless network sharing the Ethernet internet. I was able to connect my Mac WITHOUT 802.1x to the internet for some time (authorised for a short time by the university) and was able to access the Wifi network and the internet with the iPod Touch.
However, as soon as I connect to the 802.1x network, Airport dismisses it's network, it just disappears ...
Why does it do that, can I prevent it and if not, is there any alternative for my problem ?

Yeah, I was just going on/hoping for... the 802.1x likeness.
Have you repaired Permissions lately?
Might try trashing these files & reboot...
/Users/nnnn/Library/Preferences/com.apple.internetconnect.plist
/Library/Preferences/SystemConfiguration/preferences.plist
/Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist
/Library/Preferences/com.apple.sharing.firewall.plist
... of course you dont have to trash them, you can just move them to the desktop to drag back if it doesn't work.

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