Multicast not working over WiFi?

I've got an SMC Barricade 7004AWBR. It's your basic cheapo residential DSL
router with integrated wireless access point and 3 10baseT ports.

I recently got a Roku M1000 SoundBridge, which is supposed to be able to
talk to an iTunes server. To make a long story short, if I put both the
M1000 and my iTunes server on 10baseT ports, it works fine. If I move the
M1000 to WiFi and leave the iTunes on 10baseT, the M1000 can't find the
server.

A bit of packet sniffing has let me to the conclusion that the access point
isn't passing multicast packets between the 10baseT ports and the wireless.
The M1000 uses Rendevous to locate the server, and Rendevous uses multicast.

If I do:

tcpdump -x -s 0 ip multicast and src 192.168.2.15

(where 192.168.2.15 is my iTunes server) on both the server itself (on the
10baseT side) and on a laptop on the wireless side, I see Rendevous packets
on the server itself, but not on the wireless.

So, my question is...

Is it possible that my access point is not passing multicast packets? I
would have thought it would be doing transparent layer-2 switching between
the 10baseT and wireless sides, and wouldn't care what's going on at the IP
level.

There are compatiblity issues with various routers/APs and the Roku, I
checked the website and your SMC has not been confirmed to work with
it, although, others have had some luck (with other brands) by
upgrading their routers firmware.

Just wondering -- do you have Connect running and the Roku activated?

"Roy Smith" <(E-Mail Removed)> wrote in message
news:roy-(E-Mail Removed)...
> I've got an SMC Barricade 7004AWBR. It's your basic cheapo residential
> DSL
> router with integrated wireless access point and 3 10baseT ports.

JB <(E-Mail Removed)> wrote:
>Just wondering -- do you have Connect running and the Roku activated?

What is "Connect"? And, yes, the Roku is working with another iTunes
server on the wireless side of the network. It only has trouble
seeing a server on the 10baseT side.

>
>"Roy Smith" <(E-Mail Removed)> wrote in message
>news:roy-(E-Mail Removed)...
>> I've got an SMC Barricade 7004AWBR. It's your basic cheapo residential
>> DSL
>> router with integrated wireless access point and 3 10baseT ports.
>
>