Also, some USB hubs may not provide the full spec of power to every port
on the hub if you happen to be using all of them. I'm using 5 of the 6
available ports on my little powered Zonet USB2 hub (with transfer rate
to prove it!) but if I add my 2.5" external notebook hard drive to the
last available port, the drive doesn't get enough juice to power up and
make a connection. Directly connected to the computer, it works fine.
If it's really a USB1 hub, it may not be providing enough power for
everything connected to the hub when you plugged your keyboard into?
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