AppleScript+Pages: Export command always fails with permission error

Here is my script:

tell application "Pages"

set thisDoc to open "/Users/fmillion/test.pages"

set docFile to file of thisDoc

log "The file is " & docFile

export thisDoc to "/Users/fmillion/test2.docx" as Microsoft Word

end tell

The script runs, Pages opens and loads the document. However, the Export step fails. Here's the full events output:

tell application "Pages"

open "/Users/fmillion/test.pages"

--> document "test.pages"

get file of document "test.pages"

--> file "Macintosh HD:Users:fmillion:test.pages"

(*The file is Macintosh HD:Users:fmillion:test.pages*)

export document "test.pages" to "Macintosh HD:Users:fmillion:test2.docx" as Microsoft Word

--> error "The document “test.pages” could not be exported as “test2”. You don’t have permission." number 6

Result:

error "Pages got an error: The document “test.pages” could not be exported as “test”. You don’t have permission." number 6

No amount of fiddling with parameters will change this. Obviously, I have write permission to my home directory, which just to be absolutely sure I verified. (I do.) I even tried creating a directory with chmod 777 to give it world-writable state, but Pages still wouldn't export there.

I feel like I'm missing something - could anyone tell me what it is?

Thanks!

F