[Serusers] SIPSAK CAN not pass 407 authorize

[dev2003 at mail.ustc.edu.cn]

ser.cfg
                  if (!www_authorize("", "subscriber"))
                  if (!radius_proxy_authorize(""))
sipsak have passed 401 authorize.But can not pass 407 authorize.

I found server send 407,
sipsak send
 INVITE SIP/2.0..Proxy-Authorization:
sipsak NOT ok
received:
 error: did not received the INVITE that was sent (see above). aborting

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but kphone send  ACK
and   INVITE Proxy-Authorization:
is ok
please help me