802.1x connection problems at school

I am having some problems connecting my Macbook Pro to my wireless school network. My school is using a 802.1x network where i can login succesfully to the network using my username and password, i am getting this screen when im succesfully logged in (just logging in, no valid ip)
http://upload.roysterken.nl/files/images/1507802.1X.png
I'm using DHCP as you can see here,
http://upload.roysterken.nl/files/images/6694network.png
Tried renewing the ip several times. I dont seem to get a valid ip adress (only 169.x.x.x) i also tried manually entering but no help there.
I have been searching on google for any solutions for this problem and the only topic about this manner was found on this forum.
http://discussions.apple.com/thread.jspa?threadID=376871
I installed all the updates so i could not find a solution there.
Some system information about my wifi card:
Wireless Card Type: AirPort Extreme (0x168C, 0x87)
Wireless Card Locale: Worldwide
Wireless Card Firmware Version: 1.1.9.3
Can anyone help me?
Thanks in advanced.
Roy Sterken
Note: My wifi card is working perfectly using WPA / WPA2 or WEP at home.

hey roysterken,
to the begin of last week i suffered a similar problem. During three days my MBP was not able to connect to the wlan of my university. As you, I did not get any valid ip adress just the standard 169.x.x.x.
The only valid IP address the book received was after a restart, unfortunately after the next releasing it was not valid anymore. When the book had to release its ip address (every 5min in our net) it did not accept any offer from the dhcp server.
Perhaps you could capture the network traffic between the dhcp server and client(your book). For such a scan you need wireshark.
Since thursday morning I have no problem to connect to the network. Unfortunately I do not know what has changed. All the time i sufferd that problem I was in contact with our network support and as far as I know I was the only one at our university who suffered that issue.
I found something else on the net, perhaps it will help you. It describes the same error as I had.
http://lists.sans.org/pipermail/unisog/2007-January/027056.html
Message was edited by: Nosye

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