multicast routing issue?

Hi,

I have an application which should join a multicast channel at beginning

and then listen to that channel for any data come through. The multicast
server is several hops away and the only way I communicate with it is through the cisco 806 VPN router. The router is suppose to configure to
route the traffic for any channel join request and pass through the data
that come from the multicast server.

But my problem is that if I join the channel from the VPN router, I can receive the traffic ok. But the request to join the channel from my program didn't get to the router and forward alone. The program is running on a solaris box that connected to the VPN router.

I did "snoop -d dmfe1" to sniff the packet, and found that the program seems to generate request ok,

10.72.24.8 -> 233.119.160.142 IP D=233.119.160.142 S=10.72.24.8 LNE=28..
10.72.24.1 -> PIM-ROUTERS.MCAST.NET IP D=224.0.0.13 S=10.72.24.1 LEN ..

233.119.160.142 is the multicast server from which I request the data.

but it seems that the request didn't get to the router, since I did "show ip igmp groups" and I don't see the channel I requested. I am not sure what I did wrong here.

The ifconfig show me that the interface has multicast enabled, and the "netstat -rn" show me that the "224.0.0.0 uses 10.72.24.8 as gateway"
ip(10.72.24.8) is the one that connect to the VPN router, VPN router ip is 10.72.24.1.

Wonder if anyone has a clue what's wrong here, I read something about the multicast routing, but I am not sure what to do with it.

Thanks for the help.

John
.

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