usb hub 2.0 problems with macbook pro retina 13'' and virus ti2

  • dear sirs, last week i own a macbook pro retina 13'' 2.6ghz i5 dual core with OS X 10.10.1(Yosemite). I can't use my virus ti 2 when i plug on the other usb ports an usb 2.0 hub to connect the rest of my gear.
    this is the error message: A device called "USB 2.0 Hub" sharing the same USB root hub with the Virus TI has been detected. This is a potential problem and might cause sync errors and audible artefacts when using Total Integration. Try to solve the problem by using another USB port instead.
    Disconnecting the usb 2.0 hub from the second usb port of my retina, the ti2 works fine.
    Hope you understand my problem, thanks in advance.