helmet part1

here is file for a part i have which makes a helmet when completed, the only problem is i cannot for the life of me get it to print properly. you can download this helmet at zortrax.com but it keeps failing, it realy is impossible to print. please can someone see if they can work there magic and see if you can print it and if you succeed please send me the altered file. i realy want to print this helmet but it is so frustrating. note..... i did not design this i just want to print it.