La solucion es poner el nombre del ordenador en letra minuscula, eso li en otro foro.
HERE COMES,,, terrible bugs fixing, temporary solution !!!
change your "computer name" >>> not capital but small one.
ex) if your computer name is , "EA" >>> change to "ea", or "americana" etc.
After changing like this way, I finally play FIFA 15 without any problems !
BYE ~~
* just play this temporary way, and wait EA's official patches !!!