I'll go into detail anyway

I was building a new mission in fred_open today that I had been working on for a few weeks. I had tested it many times before today as well as testing it many times today, but I recently came close to finishing it and so I decided to test it. For some reason it did not show at all in the list in the tech room. Can someone please outline the possibilities of what could be wrong for me? Or if not could someone please take a look at it if I post it on here?