Now Dragon, do other MP routes work for you? Did you upload every asset used in every asset on the route? Such as horn sounds for locomotives, wheels etc. Did you upload the route, and the session, then wait 24 to 48 hours to try playing it, or did you upload it then try right away. Your route and session has to be on the DLS for a minimum of 24 hours before you can play it. I don't know why it works that way, but I have found that it takes about that long before the game recognizes your route and on the DLS from the time you upload to the time you can play.
Lastly, for the love of trainz, please use Firefox or Chrome, they both have a spell checker.