The solution:
reread this about the setup http://supcom.wikia.com/wiki/MapEditTutorial_Lesson_3. You have made some mistakes in there. I solved them all and probably changed more than necessary to the result of what I'm posting in the code, so it's best to change as little as possible (that's why you should read what's in the link and change where you have things different, then you're also fairly sure this mistake won't happen again).
When I tried to change some things, it soon got from bad to worse, so what I eventually did is copy the code from a different, working, map and change the required things (name, internal links such as /maps/...) and this is the result for the scenario file:
I removed the code, because apparently it doesn't work. I have tried again and the resulting code, that works for me is here: http://www.faforever.com/forums/viewtopic.php?f=53&p=73754#p73754
Finally, your script file should look like it's in the link, rather than what you have now. You have the function Onstart(Self) end bit missing, and another line is added (although I'm sure that that doesn't matter, I don't think you have to remove that line).
That should do it.