windows supplicant

I've been working on this on/off for 2 weeks now and I'm confused. I found on this Windows laptop I've been playing with that I can't connect via the built-in Windows XP SP3 supplicant but one connection I can make is using the Intel ProSet (it's a 2100) but the only way that I've been able to connect is using TTLS. The Intel Pro-Set suggests that my connection is: Security Mode: WPA Encryption Algorithm: TKIP 802.11 Authentication: Open 802.1x Authentication: TTLS (MS-CHAP) and I note that MS-CHAPv2 doesn't work here So I'm now wondering if the problem is my setup of eap.conf the MS-CHAPv2 I am authenticating RRAS from a Windows server and Macintosh and iPhone clients without issue. Craig