Options don't seem to work correct - by: Peter

Hi,

I have made an option for flavours for an candybar (article)
I have added this option to the article.
But there is no way to choose the option at the product. It just shows the list with options as text, not as a selectbox.
I have also tried radio, and checkbox, but nothing changes.
What am I doing wrong?

Hopefully somebody can help me,

Regards, Peter