IPTV Issues

Hello all,

I have an R7000 running Tomato connected via PPOE through a transparent bridge modem.
However I can't seem to be able to access any IPTV channels? I have BT TV, but i'm sure settings are more or less similar.

Please could some advise on the correct settings to get this working on Tomato? This one has left me a bit bewildered to be honest!

Current settings:

Advanced > Routing > Efficient Multicast Forwarding Enabled
Advanced > Routing > Mode - Gateway
Advanced > Firewall >...

IPTV Issues