There is a problem with my site when users try to add a new entry to our database. After logging in users can click on the 'contribute' tab to add either a model or a dataset. Most areas of this work, but for some reason, the authors are not being added correctly. Usually they simply do not show up. I need to fix this so that authors are added to new entries.
The site is here: [url removed, login to view]
log on with test/test