How can you disable the alarm on a 2004 Honda Odyssey?

The security system recently seemed to change on our 2004 Honda Odyssey. It now automatically locks the doors after exiting the van. It originally did not do this and did not "chirp" when being locked. Any ideas on how to go back to the quiet version?How can you disable the alarm on a 2004 Honda Odyssey?The chirp means it's alarmed... usually when it doesn't chip, it means it's locked, but not alarmed. Someone would be able to break into the car easier if it's quiet.