Windows Vista and 802.1x ..

We have an problem here where I work. It seems like Windows Vista no longer can open 802.1x / WAP / TKIP / PEAP / MS-CHAP-V2 connections using the built in stack to our FreeRadius 1.0.4 install. It worked, mostly, in XP. It worked WELL frmo the IBM Connect software than comes with Thinkpad's (our laptop of choice here). However, that software, in Vista, is mostly a front end of the internal stack and doesn't work anymore either. Any ideas? - Yossie