Hi, i ahve been trying to play music from my laptop pressario cq40..connected to arcus 200 amplifier (and kef iq 10speakers) via usb using ,the usb port in the amplifier and cq 40...but my laptop wount recognize the amplifier and i cant get it to direct the music to the usb port,, do i need a specific driver...in the amp there is built in converter so it should not be a problem for understanding the info in the form as it comes out from usb port..