about the final submission of my original sketchup model

I would like to mention the final submission of my original sketchup model. I was trying to follow the guide line posted by russell in the blog since my sketchup file is too big for google 3d wearhouse. But finally the submission comes into failure without any reason(the page turned off automatically) even though i had been trying to upload it for more than 5 times. Hope tutors will understand this situation. Please let me know if the original model has to be provided compulsorily. Thank you!