Power Management Based on BQ24071

Good day~all

I’m a electronic hobbier and I like to make some electronics by myself. And I met some troubles when I am making a power management based on the chip–BQ24071RHLR. ( the datasheet of BQ24071RHLR )My schematic diagram is given below:

Now my situation is: It can operate when powering system by battery as well as 5V power.
However, the battery cannot be charged by 5V. Why? Please give me some suggestions!

Thanks a million!