Wireless Assosiation Failed

I have got real difficulty connecting to a wirless internet. The wired thing is that the network that I am trying to connect to was connecting me before, but unfortunatly (as I am in halls of residance, and did not have a anti virus running on my computer at the time) could not get through security. After much hair pulling the IT guys here pushed me through. I thought that they had somehow blocked me from the router becuase as soon as they said they fixed the problem for me I no longer could connect to the network! I am able to connect via ethanet now, and the IT support guys are completly baffeled, they have done everything their end to try and get me up and running via wireless, they even took me off the net work and added me on again to clear all settings that may have been changed!

I can see the network and it has full signal, but when I connect it says failed. I run the problem thing and it comes up with this message. 'Wireless association failed becuase Windows did not recieve and response from the wireless router or access point'. After typeing this into google and being transfered to this site I see that other people have had similar problems. I keep telling the IT guys that it cant be my comp as it is only a week old!! But could it really be a problem with vista? The IT guys have gone through settings and things with me etc and still not worked, so is there something that I need to do to make this work? As i said its only a week old and so far not been able to use the internet via wireles.