Why can't I upload a model ?

I have problems during uploading a model.
I choose the zip-file I want to upload, and everything is good :)
But when I choose the software to be Inventor, the upload prosess turns back
and I get back in the "sign in" window.

What do I do wrong ?

2 Answers

Does it happened once or again again?

I changed the browser to Chrome, and then it worked :)