Get path to image in Indesign CS3

I’m trying to get the path of an image in Indesign. I found this script here but I can’t seem to get it to work.

tell application "Adobe InDesign CS3"
	tell front document
		set imagepath to file path of item link of selection
	end tell
end tell

I get this error message.

Adobe InDesign CS3 got an error: Can’t get file path of item link of selection of document 1.

Am I doing something wrong?

Crap, never mind, I was embedding the images, not placing them…duh.