Because dropbox hosts the SWF as a file available for download, fairly sure if you use regular images dropbox does work though. There might be some way to make SWF on dropbox work but I don't know it. Try using imgur instead, it always works without any tweaking.
Thank you for the critism, i will try it out and show you guys the result:) i host my Images on dropbox and insert the link like u guys said. Why do the Images not work?