Hey Jennafer,
Did you post your picture on a web page? You need to post in on a page and then copy and paste the address after you push the "image" button. I don't think it's telling you that your picture is called picture.one.gif, that's just an example telling you what not to do.
The first time I tried I just told it the name on my hard drive, but it only let me see the picture and noone else. I hope that helps, write back if you have anymore questions.
-Paul