Can I show the user only what he got wrong on a drag and drop submit?

Hello,

I really like the Captivate drag n drop.  I think there are a lot of cool things you can do with it....

I have two questions that I have never really been able to figure out.

1. Can I show the user just what he got wrong when he hits the submit button?  And then allow the user to reset and do it again?

2.  Is there a redrag event or a reset event I could possibly use?  I have created a drag and drop where the user knows instantly if he dropped something on the wrong spot or not.  The corresponding red or green box is shown when he drops.  The problem is when he redrags the object (in the event the box turned red for wrong), the red box obviously stays shown.  I would love to be able to hide the red box again once the user redrags or resets so that it goes back to its neutral color state...

Thanks for any help.