I've got my usb HDD connected to my airport extreme base station. I can see and access it via my tiger MBP no problem but for some strange reason today I cant access it from my leopard iMac. It had worked no problem since today but now when I click on my base station in the finder and then select my HDD and it just says connecting and never actually connects the little icon just spins in the bottom corner. My Leopard iMac is connected to my base station via ethernet so its not an wireless problem. My finder doesn't hang it just doesn't connect so if I exit finder and try again my iMac only see the case station and not the HDD inside?

Any ideas?