Do not use sites like " imageshack dot us " and if you discover a hosting service for pictures, check first if they allow HOTLINK otherwise you may have a big surprize and see they removed all your pictures after a time period, so check their TOS better, ask on forums, ask them by contact or ask on google. pimpandhost and tinypic accept "hotlink"
use link from a picture ( make sure they accept hotlink ), I recomend tinypic or pimpandhost, do not use imageshack becouse they don`t accept hotlinking and they will remove your images. Or you can upload from your desktop with " local file "
At " Links " don`t use codes and just put the download links ex. rapidgator com/downloadthisfile , or else other error with come.
I had the same problem but after that, I realized that no one validated my news or, very probable, my news were rejected.
You got that error becouse of the download links, DO NOT use " Rapidgator ... whatever " code.