It seems like the target you are trying to reach is refusing a TCP Connection (handshake). While it may be responsive to a TCP ping, the TCP Connect script actually initiates a conversation with the target (which is what is being refused). You may want to attempt to trace to a target that you know is responsive to TCP conversations (i.e. PingPlotter.com using port 80) to ensure the script is working correctly.

Unfortunately, at this time, we don't have any other options available for you. I am going to submit this to our team to attempt to resolve for a future point release.