Cron failure

I have installed signup, signup status, signup scheduler, signup status mailer.

I'm getting these messages when I run the cron. I think it is related to Signup Scheduler, based on the table name being referenced. It seems like maybe the table column name should be 'complete' instead of 'status'?

* user warning: Unknown column 's.status' in 'where clause' query: SELECT ss.nid FROM tcn_signup_scheduler ss, tcn_signup s WHERE ss.status = 1 AND ss.close < 1207850010 AND ss.nid = s.nid AND s.status = 1 in /home/sihatgro/public_html/you4ia/test/includes/database.mysql.inc on line 172.
* user warning: Unknown column 's.status' in 'where clause' query: SELECT ss.nid FROM tcn_signup_scheduler ss, tcn_signup s WHERE ss.status = 1 AND ss.open < 1207850010 AND ss.close > 1207850010 AND ss.nid = s.nid AND s.status = 0 in /home/sihatgro/public_html/you4ia/test/includes/database.mysql.inc on line 172.