That means that you need the ACR (camera raw) plugin version 8.5. You can update PSE12 to that version (Help/update) provided your OS is compatible (note 5 in the second link)
Note 5: If you are using Mac OS 10.6, Windows XP, or Windows Vista, Adobe Camera Raw 8.4 and later is not compatible. You can use up to Camera Raw 8.3. See Adobe Camera Raw 8.4 or later on Mac OS 10.6, Windows XP, and Vista.
Since you have Vista, your camera is not supported. Your choice would be to use the supplied converter with your camera and to output a tiff file for the editor.