I have done all of the install instructions - to the point of getting the flashing REWIND - STOP - RECORD buttons. Then when I press "next" , there is a pause and I get an "ALERT" popup. If I go into my logic pro X and try to set it up as required under the Mackie HUI , the Mackie HUI icon will not open to allow setup. I have no clue anymore. I have unplugged, tried and retried ............... any help is appreciated