Dear participants. Thank you for your submissions.
I saw a few submissions that I could not add to collection. Please make sure that you have "Add to Collection" enabled. To test it, please log out, hover with the mouse over your photo, and make sure that the Send to Collection link shows up.
You can allow adding to collection in the Access Control section of the edit view.
I would hate to reject your submissions because I cannot add them to the collection, but it will be impossible to process all of your submissions without having an efficient process in place.