I have been expiramenting with using VLC to subscribe to TV feeds on a TV-over-DSL network connection offered by my ISP. It uses multicast to deliver the content to the subscriber, usually a set-top box. For some reason, whenever I have Zone Alarm Pro loaded, even if I set the firewall to off, it appears the IGMP command packets are not getting through. As soon as I turn off ZA, the subscription packets get through and the stream comes in. If I turn ZA back on after I have the subscription started, the multicast UDP packets continue to make it through. I can't figure out how to configure ZA to allow these incoming and outgoing IGMP packets. I've tried setting up a firewall rule telling it to allow Any IGMP protocol, and I've tried created a trusted zone entry with the multicast address range. The odd part is that even when I use the slider to turn off the firewall, the IGMP packets are not getting through.
Any ideas?

Operating System:Windows XP Pro
Software Version:7.0
Product Name:ZoneAlarm Pro