[SOLVED] Post Thumbnail settings wrong?

I am trying to somehow use the thumbnail function, which i believe is build in Atahualpa 3.7.3. I have set all the switches in Configure excerpts to Only excerpts but in the Post Thumbnail settings I still get an error message: Note: Post Thumbnails are only displayed on multi post pages, which have been set to display 'Only Excerpts'. See menu tab 'Configure Excerpts'.

So I am wondering what I am doing wrong, all the switches are on 'Only Excerpts' in the 'Configure Excerpts' section, but I still getting the error message.