It sounds to me like an address conflict. Are you *certain* that you have no other device with the same static IP on either end of the link as the G?

With the G turned off, can you ping its address and get any response (telltale sign)?

If using WPA or WPA2, you should enable broadcast of the SSID, BTW.

log into the G and look at your connected devices. Make sure they're all there, and that nothing has a conflicting address (it shouldn't, or it wouldn't likely be listed).