PT9(and 10) do require a working ASIO driver for whatever you are trying to use. I thought the POD HD USB was for computer control and editing? Does it also allow for audio to pass? Did it come with an ASIO driver? You can always try ASIO4ALL, which is a freeware driver that works for a lot of things. If the HD doesn't work, you could always connect it to the Mbox with a SPDIF cable. Good luck
