Generally parenting the clothing prop to the figure's hip is best. It has no effect on how the cloth will move. It just enables you to move the figure and clothing to another part of the scene if required.

The clothes could be falling off for a number of reasons

• Is the clothing positioned to not intersect the figure when at the zero pose?
• Have you selected to drape from zero pose?
• In the cloth room have you set the clothing to collide with the figure?

Would it be possible for you to post a couple of screen shots so we may see what is happening?