"Error: handler for user_titles > image doesn't exist!"

Hello,
after installing the module and adding user titles and their images I noticed the images don't show up, only the names of the titles.

Also when I tried to add a field in a view, I got this error message:
"Error: handler for user_titles > image doesn't exist!"

Probably related.

Tried the last stable release and the last beta, no change.

Help please? What could be wrong?
Using Drupal 6, nothing special installed.