HP Dv6000 won't connect to school wi-fi

Hello,
I have a HP Dv6000 with Windows Vista Home Premium...I can connect to any network (that I have tried until now), except the one at school.

In "Networking and Sharing Center", there is :


My Comp -------------- Mac Miniport Bridge(or something)-------------X----------------Internet (in grey)


I can connect to the network at school but I don't really have internet.
The "X" between the network bridge and the internet says it can't connect with DNS server...Does anyone know how this can be solved ? I have updated all drivers and still won't work.

Help Please ! vvilly44@hotmail.com