Can You Solve It?

http://freeweb.siol.net/danej/riverIQGame.swf

Press the blue circle to start. You have to get everyone across the river. Here are the rules:

1. The father cannot be left alone with any daughter (without the mother present).
2. The mother cannot be left alone with any son (without the father present).
3. The thief cannot be left alone with any family member (without the cop present).
4. Only the father, mother, and cop can operate the boat.

I solved it, can you?