Your Folders need their settings changed so that other members may submit. You can change folder setting by...
1. Going to the admin Tab
2. Click Manage Members
3. Click the Specific member to change Setting for [ex. members]
4. Scroll down to "On Gallery,____"
5. Click 'View All Folders"
6. Change each Folder to the setting you would like people to submit.
7. Repeat 3-6 for each Member Type.