Shuffle puts computer to sleep?

I purchased the shuffle for my husband for Christmas. It initially worked, but now, when I put it on the dock, the computer basically goes to sleep and won't wake up. The monitor goes to sleep and the only way to get the computer to work is to unplug it and turn it back on.
Anyone else have or hear of this problem? Any ideas for how to fix?
(Note: we tried a different dock with the same results. Also, this problem does not occur when I plug in my Nano.)
Thanks!

This also happens to me but only occasionally and my monitor stays on. I also have to unplug it in order to successfully restart it.
I haven't been able to determine exactly how to make it happen but it always occurs when I'm plugging my shuffle in to the dock. When it does happen, the power light on the front of my PC goes off and although the monitor stays on, the cursor is locked. I went as far as replacing the PC's power supply but that did not help.
It'd be great to find a solution for this, especially since we just got a second shuffle for my wife.

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Hi, first things first...I've the proud owner of a
brand new MacBook...I love it! It's my third mac...so
I'm really excited. Anyways, I generally stay signed
on iChat 24/7 and also like to be downloading things
while I'm away...However, when I shut my lid...it
puts the computer to sleep. Is there any way to set
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Message was edited by: lupunus (typo's fixed)

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Shuffle puts computer to sleep?

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