[Prism TV] IPH8005 plays a channel for 15 seconds, then freezes after tomato

I have a Actiontec C2000A IPoE (no PPPoE login) and a Pace IPH8005 HD IPTV for the Prism TV service. I have a router with the Tomato by Shibby firmware http://tomato.groov.pl/?page_id=164 I followed http://www.dslreports.com/forum/r29358085-VLAN-Tagging-on-Tomato-for-FTTH to replace the Actiontec C2000A with the Tomato router. I changed the VLAN for the WAN port to 9 with a VID of 0 and the First 802.1Q VLAN tag as 192. I checked off Trunk VLAN support override. I can now browse the net. [att=1] The Pace IPH8005 HD IPTV worked fine with the C2000A, but with the tomato router, it plays the channel for 15 seconds and then freezes. The menu and guide work fine. Changing the channel works, but again only last for 15 seconds of audio/video. I am using CenturyLink's DNS server and no QOS settings. I browsed through the Actiontec C2000A settings, but did not find anything that I needed to config on the tomato router. Does anyone know the cause and solution to the 15 second freeze? Thanks!