IPhoto won't launch. Please help.

10-11  Source: Network gathering  Views:0 

Asking for to run Software Update to install. But when I run Software Updates from the Apple menu, none are available when prompted. Also, when I visit the Purhcased section on the App Store, it says iPhoto is already fully installed. But it's not working. Confused.
Mac OS X 10.7.4
Thanks for any help.
first: restart your mac.
(run all the updates)
second: run repair permisions of your HD
third: try again
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