New Transmission add-on thread

Hi, apologies if this has been posted / resolved before - if it has, I can't find the solution!

I'm using:
ReadyNAS Duo with RAIDiator 4.1.7 [1.00a043] with IP 192.168.0.2
Transmission. P2P Client v2.33
NetGear DGN3500 router

DGN3500 Router is configured with:
Service called "Transmission", type "TCP/UDP", ports 60000 - 65535
Firewall outbound rule ALLOW always, Transmission service, Any LAN, Any WAN
Firewall inbound rule ALLOW always, Transmission service, LAN 192.168.0.2, Any WAN

I can access the Transmission web interface without issue.
I can add torrents without issue

The problem is that the torrents will not download, or connect to anything.

From the Web UI, the preferences / network tab is reporting:
- Peer Communication: Enable Micro Transport Protocol (uTP) is Enabled
- Peer listening port: Incoming TCP Port: 61413 "Port is closed"

What am I doing wrong? Please help ...