I followed the following instructions and was connected to the wireless network at my school using my windows laptop:
Network Authentication: WPA
Data encryption: TKIP
Protected EAP (PEAP)
Trusted Root Certification Authorities: Thawte Premium Server CA
Select Authentication Method: Secured password (EAP-MSCHAP v2)
When I connected via my laptop, a windows login window showed up where I had to enter my user name and password. On my e61, all of those settings are available. Yet, when I try to connect, I am not prompted for my username / password. Any ideas on how to connect?