The first thing to do would be to open the hierarchy editor on an existing piece of clothing to see how it works. Pick one that's similar to yours, of course. You'll need to reproduce that same hierarchy on your figure - there's more info in the manual, and rotation orders are important as Nerd says. There is an easier way, though - if you have an existing piece of clothing that's similar to the one you made (i.e. it has the same body parts), you can use its CR2. Unless you're trying to introduce special features, this is much simpler.