Question : Flex Drag and Drop

I'm successfully dragging and dropping an object from a list to a datagrid in flex. However,I'd like to check for duplicate entries based on the ID number of the object when the user drops the item into the datagrid. How do I access the properties of the object being passed in the DragEvent? I've tried to pull the contents from draggedItem but it seems to be null. Thanks for your help.

Answer : Flex Drag and Drop

I should mention, this assumes the Server Service is set to Automatic and started.