Wireless Bridge Question!

Hello!

Apologies for this very basic question but I'm a bit new to all this. Here's my setup:

Upstairs, I have a LINKSYS WRT54G2 connected to my cable modem.

Downstairs computer connects directly to the Linksys in order to access the internet and my network. This works just fine.

Also downstairs, I've set up a WRT54GL with Tomato v1.25 as a wireless bridge (matching its information with the Linksys upstairs). Wired to the WRT54GL is my Xbox. The Xbox is properly assigned an ip, I can see it as one of the clients on my WRT54G2 (although the device name is blank), and it is able to connect to the internet just fine.

However, my computer cannot ping my Xbox and my Xbox cannot see my computer. I'm running Windows 7 64-bit.

I can't help but think that there's some basic setting I'm missing on one of the two routers. Any suggestions would be hugely appreciated.

Thanks in advance!