FreeRadius-2.2.9 - Help with NAS

[Aurélio de Souza Ribeiro Neto]

Hello Everyone,

I'm a newbie in FreeRadius.

I have a FreeRadius 2.2.9 authentication in MySQL database, and my NAS 
is a Mikrotik routerboard. My dhcp-pool is MySQL.

Everything is working fine, but I have a problem:

I made a mistake and set different passwords on the NAS and the 
database. So when my client requested access the Radius Server provided 
an IP that was not received by NAS. The NAS then requested another one 
and thus my pool finish.

Is there a way (perhaps post-auth) to prevent this form happening? Maybe 
it is checking whether the NAS received the response from the Radius Server?

Thanks

Aurélio