Sorry, cant manage the dropbox, changed to a link.
you have to copy the public link. you go in to you'r dropbox folder on you'r computer, and just right click the file, and copy the public link, by just right click the file.
or if you go on the web page:
- go to the public folder on dropbox.com.
- right click on the drawing you wand to share with us.
- click on "copy public link"
- past it in to here, and add IMG-tag around