According to Amazon's Product Page for your USB hub, the front three ports will charge, the remaining are for data transfer. You should also make sure you have the hub's power cube connected and plugged in.
What are the amp ratings of the 10-port models (USB2/3)? Are there per-port amp limits on any of the models? (Amazon: add this to comparison table)
A: you have 1-5V 2Amp for Charging IPad etc. and 2-5V 1Amp for cell phones. The 7 port USB connections are all USB3/2 compatable. Christine answered on June 03, 2014