I'm on my cell phone now so my view is a limites and I can't test the various buttons BUT... lol if I recall correctly, you have to place/host your pic up on the Web somewhere... and then post it like described before... as a link. There are a lot free picture hosting sites out there. I'd recommend the one I use but it's been a while and the name is at work! Back in the day the site.... Shutter... something was popular. I forget the name! Iol
Whatever picture host site you use, be sure to use a junk email address. The site will probably ask you for an email address to confirm your a real person!
I'll be back on my work PC tomorrow and will be happy to provide that link. Lemme know of you have any other questions!