railroad,
You need to first upload your picture to a server somewhere (e.g. Photobucket or Railimages) then post the photo's URL into your post. Once you do that it will then display correctly. Here's the direct link to the forum tutorial on how to do it:
http://www.trains.com/trccs/forums/899776/ShowPost.aspx
Tom
https://tstage9.wixsite.com/nyc-modeling
Time...It marches on...without ever turning around to see if anyone is even keeping in step.