Brand new apple wire keyboard is "drawing too much power." Why? How do I fix this?

Just bought a brand new Apple iMac, not even a week old. It came with a wired keyboard with numberpad. I accidently left the computer asleep over night and upon returning to it, everything seemed fine. For probably an hour or so, there were no problems, then I started getting spammed with this message; "Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled." At the time I have a usb extention, external harddrive, and keyboard plugged into the ports. After removing both the external hardrive and extention, the message coninued to pop, muliplying itself if you did not close it. After researching and doing a little experimenting I was able to determine that the usb port on the right side of my keyboard is the one being disabled. (A mouse will not work when plugged into the port but will on the left side) I have also restarted the computer, shut it down,unplugged it, and started it again. The message returns immediately upon reactivation. As I type this I am being consistantly interupted by the message. I do not have a second keyboard nor am I planning on purchasing one. I am disapointed in this malfunction of a brand new product. Please asist me in resolving this.
Thanks.

Ryan, try resetting the SMC
To reset the SMC
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer

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