OK I've got some more info regarding this issue. I have DIR300 and DIR655. With DIR300 IPTV works fine so I did an experiment. I've setup DIR655 to work as access point and connected DIR300 LAN1 to DIR655 LAN1. With this configuration IPTV works if i connect either to DIR300 or DIR655. So it seems that IPTV and multicast work within LAN but doesn't work WAN -> LAN,WLAN. I've also tried pinging 224.0.0.1 from system check page. DIR300 responds ping successful and DIR655 ping timeout. So it looks like DIR655 WAN port doesn't play with multicast. So DLINK guys please look into this issue. I would be more than happy to provide any additional info you might need.