Out of no where, interface is 'drawing to much power'?

Ok, so i've updated logic express to logic express 9. I've also got snow leopard 10.6.1 and i don't know if that has anything to do with this but i'm just letting you know.
i've also got a macbook pro with a 2.5GHz Intel Core 2 Duo processor with 4GB of RAM.
I've been using the TASCAM US-122 interface to plug my guitar into the computer to record onto logic for the past year or so. It has always worked perfectly nice with no problems ever.
All of a sudden now, since i updated from mac OS 10.6 to 10.6.1, whenever i plug in my TASCAM, the computer reads this...
'Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled.'
...and that's it. it tells me i can't use it. then i unplug it and try another USB port on my laptop. the same thing. I've yet to be able to plug this thing in and use it again.
What do i have to do to get this working again without having to go to the Apple store which is 35 minutes from where I live.
also, i have the Phantom power turned OFF on my TASCAM, just in case you were thinking that was what was drawing to much power.
please help me. i'm hopeless :/

I have had this issue both with OS 10.5 and now with OS 10.6. I don't quite understand it because once it starts happening, it happens with and without USB devices connected to the computer. It is extremely frustrating.
I often attach a bunch of USB devices, they always either have their own power or are attached via a powered hub.
My current thought is that this was somehow triggered by a memory card reader (Belkin) in the PCI slot as it seems to have started this cascade both times.
Using OS 10.5 - all was well until one day, the dreaded overpower message came up. The reader didn't work and it eventually turned off my external keyboard/mouse. Taking out the PCI card minimized, but did not eliminate the problem.
When I moved to OS 10.6, the problem seemed to go away. This past week I went on a trip and used the PCI card and now the problem is back. The card has been removed, the OS has been reinstalled and still the issue occurs. I will get the message even if there is no external USB device attached. If there is a USB device attached it will occasionally turn it off (so far only the right hand USB port). This is very annoying. It doesn't seem to bother the left port (where I currently charge my iphone during the day), but will turn off a keyboard - go figure. It happens both at home and at work even though the device attachments are totally different (the only constant is the iphone, even the USB dock is different dock).
Would love to resolve this issue once and for all!

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