proxy problem/question

[VannMann32 .]

Hi !

I'm trying to set up a freeradius (1.1.0) server to proxy ms-chap-v2 to a ms 
ias server.

If I send ms-chap, then the proxy works. But if I send ms-chap-v2 then
i get this error message (from debug) :

Sending Access-Request of id 1 to 192.168.1.1 port 1812
        NAS-Identifier = "vpn.domain.com"
        NAS-Port = 0
        NAS-Port-Type = Virtual
        Service-Type = Framed-User
        Framed-Protocol = PPP
        User-Name = "username"
        MS-CHAP-Challenge = 0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
        MS-CHAP2-Response = yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
        NAS-IP-Address = 192.168.1.10
        Proxy-State = 0x3339
Waking up in 3 seconds...
rad_recv: Access-Reject packet from host 192.168.1.1:1812, id=1, length=46
        Proxy-State = 0x3339
        MS-CHAP-Error = "\000E=691 R=0 V=3"



Is this possible ? Should it work ? Is it possible to proxy ms-chap-v2 ?