USB Hub Question

I was of the understanding you could use a USB HUB with the Extreme but so far I can't. I have one Lacie drive connected to the Extreme. When I try to attach the drive via a small USB (non-powered hub), my Mac does not see the drive. The drive boots up but is not registered. When I uninstall the HUB and plug the drive directly to the Extreme, the drive is seen.
Any ideas??
Thanks!
Sky......

I have a passport that works only with a powered hub, but the passport (WD) is not a powered hard drive. I guess it doesn't hurt to spend $10 on a powered hub.

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