Telstra is not known to shape p2p or block p2p ports.

As Grandpa suggested, manual port forwarding is much more reliable than UPnP. I don't know why this should make such a difference after changing to adsl but ... (perhaps cable offered a more consistent & insulated environment) ... at least that's a safe direction to head. Any advice if you're not sure about port forwarding just ask. It will mean you'll initially need to set up a static ip. If you don't then the port forwarding won't work after you reconnect.

Sorry WW perhaps I got the ip address wrong. It's apparently 10.0.0.138