[Freeswitch-users] mod_nibblebill.c:558 Failed to log to database

Hi everyone. Can anyone tell me how can I troubleshoot that kind of error: mod_nibblebill.c:558 Failed to log to database PS: using MySQL via ODBC. In nibblebill conf I have: odbc-dsn="odbc://billing" ISQL test: isql billing - works good. Show tables, queries, e.t.c. Any ideas?