Woocommerce Customer Login Not Working

According to thread http://wordpress.org/support/topic/woocommerce-customer-login-not-working?replies=3#post-5027674

I have the similar problem.
As I’ve been trying by myself
User can register a new account it will show up in the back end under my users section and also having the notification sent to user’s email…

Thanks for creating an account on xxxxxxx. Your username is xxxxxx@yahoo.com.
You can access your account area here: http://www.xxxxxx.com/my-account/.

But after logging out and login again… it’s keep appearing

Please try to submit the form again

Awaiting WordPress guru to help as well.

http://wordpress.org/plugins/woocommerce/