Why are my USB ports are working, but not providing power?

I just got a brand new 15" Macbook Pro and the USB ports appear to be working fine for items that don't require power, but I plugged my Avid Mbox into it and the power light on the Mbox flashes, indicating it is not getting enough power. The Mbox works fine on my other Macbook Pro (2010 model) and it works on my Imac, but not the new Macbook. I have a powered hard drive that works fine on the new Macbook, so the USB port is not dead, but just seems to not be supplying power properly for this device that needs it. I don't have another item which uses the power like this to test, but I wonder if anyone has any idea if this is simply faulty hardware and if there is a conclusive way to test. As it's literally two days old, I would exchange it if it really isn't working properly. Only difference between this new Mac and the others is that it's running Lion and the others are running Snow Leopard.

If you have an iPhone or iPod that can be charged by the USB port, then the problem lies with the Mbox and/or the cable attaching it. If you google the problem (and I hope you did, because there are tons of posts at the various Mac websites about troubles with the Mbox and the MacBook Pro), you'll see people either plug and play with no issues, or they spend a lot of time doing so. It sounds like you're the latter.
Anyways, if an iPhone or iPod (or anything else that requires USB power to run) doesn't work, then the issue is your MBP.

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Why are my USB ports are working, but not providing power?

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