There's nothing wrong with the image name, which is given by the framework; not something I can control.
Regarding not showing and -200, please see: https://invisioncommunity.com/forums/topic/435365-there-was-a-problem-processing-the-uploaded-file-200/
Showing that it should be a image size limited by the host, I just added one test giveaway and works fine:
Both images, prize and giveaway, are the same.
You have access to the support board: http://www.sosinvision.com.br/ips4/index.php?/raffles/raffle/2-test-adriano/