I have replayed and replayed this at least 15 times to no avail.

Could someone give me a clue?

Jorja,

I really don't remember this puzzle but have you tried click-hold-drop them in place.

there is a walkthrough for this that tells you how to do this part, it's fairly simple. see if gb has the walkthroug and then you should be able to do it. Hope this helps.