MN500 connectivity question

Here's my layout:
Server and 4 clients off of a 100MB hub
Server running RRAS/NAT to the internet
MN500 as wireless bridge off the hub
Laptop with wireless card

All of the clients can see each other, the server, and
the internet.
The laptop can see the server and the internet.
The laptop can NOT see the clients, nor vice versa.

By "see", I mean they can not ping, or connect through
IP. Not for file sharing, not for games, not for
anything.

I've looked all over the http console for the MN500, but
I'm not seeing any setting that would allow or disallow
this.

Any thoughts?

Thanks,
Chris