Problem with user registration with recaptcha

Hi all,

i get an error as below when user register on my website.

===========================

* user warning: Duplicate entry '0' for key 1 query: INSERT INTO khos_users (name, mail, timezone, pass, init, status, created) VALUES ('han007', 'hychanhan@yahoo.com', 25200, '748ae426b84b20c411df16fd1a048098', 'hychanhan@yahoo.com', 1, 1249358359) in /home/virtualmin/wordforgefoundation.org/domains/khmeros.info/public_html/drupal612/modules/user/user.module on line 327.

* Error saving user account.

=============================

I am using drupal 6.12

Please kindly tell me , i need it to work soon so much.

Best regards,

HY ChanHan
hy.chanhan@gmail.com