I did the example brought by Tobias Liegl: "FCE (Flexible Content Elements) ohne TemplaVoila" in http://www.slideshare.net/TobiasLiegl/fce-ohne-templavoila.
But i get an error that says: ERROR: Content Element type "contentelements_contactbox" has no rendering definition! I'm working on TYPO3 6.1 Any ideas?