Import keywords from Lightroom

Hi, I seem to have a problem which I cannot fix. I've added keywords, captions and titles to all my stockphoto's in Lightroom. In the settings for exports I've stated that all metadata should be exported. When I publish the photo's using the Adobe Publish Services, of the drag and drop, the metadata don't show. Not in Adobe, nor in any other stock-site. Does anyone know how to fix this?

Thank you for your time and information!