freeradius help

hi, i'm trying to configurate freeradius in ububtu 7.04 and fedora 6. i can't in both. in fedora says: "cannot find a configuration entry for module "sql" ", "unknown module sql", "failed to parse authorize section". in ubuntu says: "rlm_sql_mysql: Couldn't connect socket to MySQL server root@localhost :radius", "rlm_sql_mysql: Mysql error 'Access denied for user 'root'@'localhost' (using password: YES)'", "rlm_sql (sql): Failed to connect DB handle #0".