Guitar Port Online is not supported with HD Hardware. You can put in a feature request if you would like:
As far as footcontrollers, you can use The FBV shortboard, FBV Express or FBV Express MKII and FBV Shortboard MKII with POD HD Pro. The original FBV Longboard will work as well but some of the buttons that are specific to the Vetta I and II will have no function so I generally like to recommend the previous footcontrollers.
Line 6 Customer Support
Line6David's answer above is correct. I have marked the answer that is correct for your question.
If you still have questions or are still experiencing an issue please start a new thread and mark the discussion as a question. To do so you can follow the link below and Ask a Question:
For more information about using the Online Technical Support System please review our FAQ at the link below: