PS3 controller charging station

Hi !

I have bought from China a PS3 dual charging station. It can charge 2 controllers or the move & navigation controller in the same time. I have only one problem with it that is the 2. port is not charging. If i want to use it nothing happening. I’ll try to measure voltages & it looks the 5v is there, but somehow the device can not switch these port to charging mode. If anybody can help please write me what is needed to get the thing working.

Thank you in Advance !