Wired Works, but Wireless won't...?

Here's a fun one.

I have a piece of hardware that works over TCP/IP (Industrial level stuff).

It works perfectly fine when I'm connected to the router via a ethernet cable. It does not work when I connect to the same router over the wireless.

I've tried disabling my 10/100 ethernet card, and restarting. No effect.

I can ping the router and connect to the web-page setup, so I know my wireless connection is good.

Oh, and have tried multiple routers (Belkin and Netgear wireless N)

Anyone have any ideas of what else to try?

 

Can you ping anything beyond the gateway address?

 

You can connect to the Router's Web menu by using the Browser and the Wireless while the cable connection is Unplugged?

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