This site is being deprecated.
Please see the official X‑Plane Support page for help.
I am not from Laminar Research; just a flight simmer from down under.
I am not a Mac user but a windows user running X-Plane on a purpose built PC.
In reading your question you have indicated that XP recognises your hardware. My presumption is you have correctly configured your individuall hardware items through X-Plane and not by using the software supplied with the product.. If you haven't, then they will definately not work.
How are you connecting your hardware items? Through a USB hub? Is it powered? Have a good look at the following link found at https://www.youtube.com/watch?v=NqwIhuxe95U from MIchael Brown. Consider the message he gives about the use of a USB hub and the power supply and forget about the product(s) he uses.
This site is no longer being actively maintained.