Database error encountered

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /home/mackinaw/public_html/components/com_extcalendar/include/dblib.php on line 69

Warning: mysql_free_result(): supplied argument is not a valid MySQL result resource in /home/mackinaw/public_html/components/com_extcalendar/include/dblib.php on line 110
ExtCalendar critical error:
Unable to load template file template.html!