here's your problem. you need to eliminate all the props not used in your stage. make a model with just the ground and berm area and cut and paste from the prop template to the blank template. this will reduce the size of your upload under 1 meg.
lynn
go to the upload to 3d warehouse, click share model, it will ask if you want to purge the model of unused objects.
try that to reduce the size of your stage. then export to 2D. see if that works. good luck.
lynn