I've a big problem with an export applescript. I would like to export many keynote files to powerpoint files. I found this script below, but there is an error that tells that the menu item "Exporter..." ("Export..." in English, my version is in french) doesn't exist.
When I change "Exporter..." by "Fermer", it works very well!!!?
May you help me?
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below the script I've written:

    set thisFile to "/Users/kyou83/Documents/pépépé.key"
    tell application "System Events"
    	tell application "Keynote"
    		activate
    		open thisFile
    	end tell
    	tell process "Keynote"
    		click menu item "Exporter..." of menu of menu bar item "Fichier" of menu bar 1
    	end tell
    end tell

'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
And here the error description

error "Erreur dans System Events : Il est impossible d’obtenir menu item \"Exporter...\" of menu of menu bar item \"Partage\" of menu bar 1 of process \"Keynote\"." number -1728 from menu item "Exporter..." of menu of menu bar item "Partage" of menu bar 1 of process "Keynote"