Freeradius doesn't read vendor specific dictionary

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?