Irda in MacBook Pro not work after 10.5.1 update

Hello.
I have one problem after i install the update for Leopard 10.5.1. The Irda from the MacBook Pro no respond to the little remote control of my Mac. I check the battery and is good.
What i must do now?
Thanks

You need to perform an Archive & Install of Mac OS X followed by reinstalling other updates applied to that system to uninstall the Mac OS X 10.49 update.
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