The man speaks true. That picture appears to be on the hard drive of your computer. No way for us to see it from here. It needs to be hosted somewhere on the net for it to show up in your post. You need to get an account with a free photo-hosting site such as Photobucket or Flickr, upload your pic to there, and then link to it here.
Either that or add it as an attachment to your post (found by clicking on "Additional Options" below the window where you write your text when posting). Only, I can't remember if non-supporting members can post attachments. They didn't used to be able to, but that may have changed. Can someone help me out here and verify that? I have no way to test it.
If you try those things and it still doesn't work just say and I'm sure there are plenty of folks here who can try and help with advice to get you sorted.