problem with secret

[Guido]

Hi list, I'm using Freeradius 1.0.2 and receiving request from Squire SVI 
Softswitch as NAS.
The problem is that Squire softswitch is not sending to freeradius the 
shared secret in request accounting.
So, I need accept accounting request from a NAS that does not send secret.
I know that secret is mandatory in clients.conf, but I need solve this...

Who can help me ?

Thanks in advance,

Guido