mysql error

I implemented site_map but my page gets the following error meesage at the top:

user 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 ') ORDER BY weight ASC, name' at line 2
query: SELECT vid, name, description
FROM vocabulary WHERE vid IN () ORDER BY weight ASC, name in /home/newyork/public_html/includes/database.mysql.inc on line 66.

Did I miss something?

thanks,
TSH