get this error whenever i post a thread

SQL query error!
Error infomation:[SQL]
update jcow_forum_posts set stream_id='875' where id='48'

[Error]
Unknown column 'stream_id' in 'field list'

in phpMyAdmin, sql-tab

[code]
ALTER TABLE jcow_forum_posts ADD stream_id INT( 11 ) NOT NULL
[/code]

All sorted thank you master

nice one....