Finally have my identical DNS-320's up and running.

They successfully connect over the internet during setup, and I can choose my remote source folder. Here's a summary:
NAS A- 500GB
Static IP location
Ports 22, 873, 62057 forwarded
Running Backup Server
NAS B- 500GB
Dynamic IP
Ports 22, 873, 62057 forwarded
Two Backup jobs scheduled on this NAS
I hit start backup now, and the status changes from "Ready" to "Backup Now:0%" and stays there for many hours until it fails. (both my B to A, and A to B jobs)

I notice intermittent LAN light activity. I would expect a lot more activity if my data was moving. Does anyone have a similar setup? Is there something I could have missed during setup?