I have the same issue with my Thinkpad. It all depends on what all is plugged into the USB. If they are all used then you don't have enough power to power the hub completely. Only a powered hub will work.
Does one work if only one of them is plugged into the hub?
IT Specialist and Consultant Lenovo Tablet Evangelist Current Machines: IdeaCentre A300, ThinkPad Tablet, IdeaPad U410, and Yoga 3 Pro Touch