rlm_sql don't re-connect after mysql failure

Hi, I'm using freeradius-2.1.11 and i have problem with mysql connection. If MySQL server goes down, the freeradius don't reconnect until he be restarted. logfile like this, but the mysql server is UP again: rlm_sql_mysql: Starting connect to MySQL server for #0 rlm_sql: Connected new DB handle, #0 rlm_sql : failed after re-connect *** this error repeats until I go restart freeradius Thanks Jean