L2TP Ipsec issue with radius authentication

[armantc]

I install Softether 5 , and configed L2TP with ipsec , ok if i add user manualy but if i user radius server get authentication error,
i use softether stabel with radius without any issue , i compare softether 5 and 4 radius packet and see softether 5 not send user password in radius request , how to fix this.