IMac won't wake from sleep since Lion!

Since installing Lion my iMac (intel core 2Duo) won't wake from sleep properly using my wireless keyboard, trackpad or magic mouse! I haven't changed any settings and I have to hold down the power button to force shut down and then restart! Any help?? x

Hi all
Finally went to the Genius Bar to ask the question as nothing has worked.  They said I needed to reset my PRAM.  I did it (Following these instructions... http://support.apple.com/kb/ht1379 ) and it worked.
So relieved....it was really annoying me. 
Hope this helps others with the same issue.
Thanks
Graham

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    Message was edited by: appleboyperry

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  • Won't Wake From Sleep

    I held off from posting this until I'd scoured the boards looking for ideas, but I'm totally out.
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