I flew from the U.S. to Australia on Qantas a few weeks ago, and I gave Qantas my AAdvantage number. However, I just logged into the AA website today and realized that the miles had not been credited to my account.

Is this because I bought a round trip ticket (U.S. to Australia, then back), and only completed half of the travel? Or is there something else I need to do in order to get the miles?