I am having trouble opening raw files in camera raw cs6

Question

In the file menu, open in camera raw is not highlighted.  If I double click on the photo, it opens in the raw converter.

Answer 1

Using the "original" setting is the correct way to do it.  Select on of the photos and use the File ➙ Reveal in Finder ➙ Original menu option.  That will take you to the file inside the library via the Finder.  Confirm that what you see if the raw file.
If it is then try the following:  make a temporary, backup copy (if you don't already have a backup copy) of the library and try the following:
1 - delete the iPhoto preference file, com.apple.iPhoto.plist, that resides in your
     User/Home()/Library/ Preferences folder.
2 - delete iPhoto's cache file, Cache.db, that is located in your
     User/Home()/Library/Caches/com.apple.iPhoto folder. 
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3 - launch iPhoto and try again.
NOTE: If you're moved your library from its default location in your Home/Pictures folder you will have to point iPhoto to its new location when you next open iPhoto by holding down the Option key when launching iPhoto.  You'll also have to reset the iPhoto's various preferences.
OT