Message not leaving scope shape

While looking at HAT, I noticed that a message that I am trying to send is not leaving the scope shape.

 My orchestration has a web service front end that passes a message to a file drop folder. A program takes this message, processes it and then returns it to a different folder (called Outbound). Outbound folder is monitored by BizTalk and takes either a response message or an error message. I then have a parallel shape where path one receives the response messages and the other path receives the error messages, transforms them into a response message. Both paths go to one send shape that sends the response message to the web service response portion.

The issue I have is that each path is in a non-transactional, synchronized scope shape. When the message tries to leave the scope shape and pass the message to the send shape, it hangs and never exits the scope shape.

I used HAT to track the message and it always gets stuck when attempting to exit the scope shape.

 Anyone seen this behavior before and have any ideas on how to fix this?

 Thanks in advance.

Cameron