Did you rename your map at any stage? If you did the function for the main menu is still pointing to your old map, I'm pretty sure this can fixed in main.menu in raw\ui? Though someone else can correct me on that and give a more detail process on how to do it.
Any chance you can post this pic on another image host like Imgur? Facebook direct linked images don't work well and my school have it blocked. I can try and help you then.
In Maya select the object, make sure to Select Hierachy, then go to Mesh>Seperate (or something along those lines), that worked for me when Models were crashing Radiant, though most models can be exported as XE (.xmodel_export) safely direct from Lime from Black Ops 2.
I'll start by saying you've sold yourself short; you should of gone for something better, this map doesn't show your skills, the map quickly became boring, it was fun to play but it lacked that feel since all it was was a box with a few obstacles.
However I'll admit it's nice you went and added the obstacles to the map, it made a bit more diffuclt, but that was outed but the fact you placed a PPSH on your map, even though it cost was 5k.
Overall I'll end by repeating what I've said above, you have the potential, don't sell yourself short with maps like this, don't go for mediocre, aim high.
I recommend having a back up of all your WaW files, but most important would be map_source (obviously), your mods folder, GSCs and GDTs and your custom files such as modified GSC's in raw/maps.