[Serusers] radius_auth problem

[Joe_chen]

hi,
	I have a problem with radius_auth, i use raidus_auth module as www-authentication ,but something is wrong, the free-radius server need the PW_PASSWORD attribute for authentication,
while the ser's radius_auth module doesn't send the PW_PASSWORD attribute, i can't find the password from the REGISTER message, there is a NONCE  like
nonce="3e1947180000000040c0e6240c7f8145a64eb654ce9a14e0"  and  encrypted with MD5. 
	Do i need get the user's password and how to get user's the password? please help.
thanks.