I have a webapp that uses Wordpress for it's authentication. I have an Account options page there. When opened, it contains a password update section. I POST this to my PHP script and run this code:

`wp_update_user(array('ID' => getUserIDWP(), 'user_pass' => $_POST['newpass']))`

It logs me out of my current Wordpress session, but when I try to log back in with the password I specified there, it says that I entered an incorrect password. I'd appreciate if someone could shed some light on this subject.

Note: the `getUserIDWP()` function is an alias for `$current_user->ID;` and the other related stuff.