Each machine must be able to accept incoming connections, so one of them is still blocked on port 6346. Sounds like the work machine, since most work places block ports for good security reasons.

If you can accept incoming, the IP and port number will be shown just about the Direct Connect box. You can also look in the Options at the Bug report section, and scroll through the example to see if you can find the line "Accept Incoming this session=TRUE (or false).