Plugin: gengo – Encounter database error (~category)

Hi I encounter the following error:

Warning: implode() [function.implode]: Bad arguments. in /home/waikeung/public_html/art/wp-content/plugins/gengo/gengo.php on line 1032

WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘) AND language_id = 1’ at line 1]
SELECT cat_id, synonym, sanitised, description FROM wp_cat2syn WHERE cat_id IN () AND language_id = 1

Thank you for help at advance