Problem when connecting to internet with a proxy...

Hi guys, I really need your help this time I hope you can follow my explanation on my problem...
Heres the deal: I just got my Macbook Air and it had been great until... I took it to my school and tried to connect to the Wi-Fi network which needs a proxy configuration (http://configura.ccm.itesm.mx/proxy.pac). First I join the wireless network and then I set up the proxy URL in network settings. The first time it worked and I was so happy, but then I closed my Macbook Air to go to my next class and when I open it again the internet is completely dead The configuration stills there but Neither Safari nor Firefox can display ANY website, the weird thing is that a lot of people has Macs on the same classroom and they get a perfect connection, I even asked them for help but they can't find what's going wrong...
This is sooo frustrating since this is an expensive Mac BTW the wireless connection in my house works great I have no problems there the only problem is at school at sometimes... Even my iPhone can connect to the wireless network without a problem and it has a smaller antenna than the Air...
I hope someone can help me I'm so confused and frustrated right now...
NOTE: There's an in-campus Apple Store and all the computers there have the internet configured exactly the same way i do...
Please help

Hi Johannes,
We are facing the same question with our 7.0 Portal (SPS 13). It seems that the application "NavigationWS" does not exist, there is not even an application alias defined at the HTTP provider of the J2EE engine.
What Portal version are you using? Is there a difference to the Portal that has no problems with providing the wsdl?
Kind regards,
Florian Dworak
Message was edited by:
        Florian Dworak

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