A friend made the script for the app, as I don't own a Mac. I sent him a pasted in copy, with the file name change, that you have posted above, by e-mail, and he made the script on his machine. Is there a chance you could make it and attach it, so I know we got it right?

property fileName : "layout.pdf"

set myPath to (path to me as string)
set AppleScript's text item delimiters to ":"
set the parentFolder to ((text items 1 thru -2 of myPath) & "") as string
set AppleScript's text item delimiters to ""
set targetFile to alias (the parentFolder & fileName)

tell application "Finder"
open file targetFile
end tell