Sending CDRs to two Radius servers simultaneously

[haneo]

Hello,
I want to send CDR's (vsa) to two Radius servers, I have added this to AS5350 gateway :

GW(config)# radius-server host 10.0.0.1 auth-port 1612 acct-port 1618 key rad1
GW(config)# radius-server host 10.1.1.1 auth-port 1812 acct-port 1813 key rad2
GW(config)# radius-server vsa send accounting
GW(config)# radius-server vsa send authentication

The problem is : the GW is sending CDRs to the first Radius only !. I want to send CDRs to two radius simultaneously.

What is wrong with my config ?

Thanks in advance.

CCNA