With a Little Help From My Friends

I can't figure this confounded thing out.

http://freeweb.siol.net/danej/riverIQGame.swf (Click on the blue circle to play.)

Here are the rules....

• Everyone must cross the river
• Only 2 persons on the raft at a time
• The father can not stay with any of the daughters, without their mother's presence
• The mother can not stay with any of the sons, without their father's presence
• The thief (striped shirt) can not stay with any family member,if the Policeman is not there
• Only the Father, the Mother and the Policeman know how to operate the raft

Someone figure it out please? And tell me!!