Why does my Lumia 930 not backup by it self.

[anon(9193737)]

Hello can anyone tell me why, my Lumia 930 does not backup by it self.

Every time i check for backup its always like 1 week ago it did it the last time, then i have to press the "Take backup" botton by my self.
And it works.

Both ar tickt on above.

Regards Oliver