I just purchased a MidiSport 2x2 interface. I come OUT of the MidiSport into a Midiman 1x4 Thru Box then into my sound modules. The Thru box has a small green LED that lights to signify it's receiving midi. It does not light up. I have checked all my cables and everything is fine. I assume since the Midisport is powered via USB that it is not getting enough power to operate the thru box. I have used two other interfaces and had no problem(Tascam 428 and Evoulution UC 33) The 428 was also powered by a power supply, Although the UC 33 was powered via USB I noticed it required 250mA. The Midisport requires 0mA...Is this why the Thru box is not operating? Is there a workaround for this???