3.0 7 Port USB hub will not work on 3.0 Port

New Plugable 7-Port USB 3.0 SuperSpeed Hub will not work on 3.0 USB Port (not enough power to support mass storage error). The port will work on a 2.0 port.
I have checked the power supply voltage, it is 5 vdc. The 3.0 ports I am using work fine with other devices.