Freeradius doesn't read vendor specific dictionary

[SusePersonalTrainer]

Hi to all!

I have a problem. My freeradius Version 1.0.2 (debian) server doesn't read 
dictionary.mikrotik file.

My configuration includes /usr/share/freeradius/disctionary wich includes 
dictionary.mikrotik.

The dictionary.mikrotik contains the attribute Rate-Limit I use to manage the 
user's bandwith.

Moreover the rlm_sql module says:

radius_xlat:  'SELECT id,UserName,Attribute,Value,op FROM radreply WHERE 
Username = 'steve' ORDER BY id'
rlm_sql: unknown attribute Rate-Limit

Why?