regarding tablemanager

Hi everybody,
Am using tablemanager module.I created a table sample with 1 column.I got the following error.
user warning: Incorrect integer value: '' for column 'tid' at row 1 query: INSERT INTO tablemanager (tid, uid, name, description, header) VALUES ('', 1, 'sample', 'sample', 'a:1:{i:0;a:3:{s:4:\"data\";s:4:\"name\";s:4:\"type\";s:1:\"1\";s:8:\"required\";s:1:\"1\";}}') in D:\htdocs\Drupal-CPS\includes\database.mysql.inc on line 172.
as well as the message table has been created.But when i click on the view tables tab it displays no tables in database.Another thing for what purpose the selection box choice fieldset is ,what we have to type in that space..
can someone help me on this.

thanks,
Vijay