Hello all. I'm having similar problems with my ReadyNAS NV+ (RAIDiator 4.01, BitTorrent add-on). I'm connected to the net through a hardware LinkSys BEFSX41 firewall / router / DHCP, which I think I have configured right (port range forwarding: TCP and UDP for the default port 6881 for my ReadyNAS's IP address).
I've tried three different torrents which all showed a large number of peers and seeders, but the download just won't get started. In the ReadyNAS torrent download manager they all show 0 seeds, 0 peers and 0 availability. And the very same torrents work on my PC with UTorrent.
BTW, oddly enough, the ReadyNAS doesn't show in my firewall's DHCP client table, but I can still access it and the network shares / network drives work. Also, the ReadyNAS had a problem downloading a remote update by itself, I had to download it to a file and apply it locally. As if the ReadyNAS was unable to access the internet. Are these problems related?
ReadyNAS NV+ RND4000 - 1Gb RAM - IT3107 processor - 4 x 1.5 TB Samsung EcoGreen F2 - RAIDiator 4.1.6