Problems with custom team...

i'm from spain and iim trying to do a custom team. i have done all steps who says the tutorial, and it sames that is good... but when i try to edit my players or i try to play, in loading the game closes. what i did wrong?? please help me! i don't know how to put images in this post, if someone explain me how i can put it, i show you the jerseys i made. thanks

I'd say there's an error with the jersey file you're using, or you didn't assemble the team correctly. You need to make sure there are 8 active players on your roster before you attempt to sign, release, edit or trade players or successfully reorder the roster.