PCo to SAP MII 12.1 destination error

Hello

I am getting an error while adding Destination for Notification.

On the Destination Tab, I am able to create MII System as Destination. And expanding the newly created Destination, i can see a child node 'Destination'. While clicking on this child node, i am getting an error as "there are multiple root elements Line 6, position 2"

What is problem?