Drupal 6: Username and Password fields are missing from /user/x/edit profile page

Question

This isn't the register page, but rather the edit user page. I don't show any updates to the user module, and no hooks (that I can find) that would have removed the fields.

Also, I checked the CSS for hidden or display:none on the elements, but in fact, the form fields are not in the HTML source at all.

Answer 1

The suggestion from Joshi above proved to be effective. Problem is resolved.