Server doesn't send response code

[Richard Gaskin]

If the headers angle doesn't check out, this may be yet another job for 
O'Reilly to the rescue:

PayPal APIs: Up and Running, 2nd Edition
Monetizing Your Application with Payment Flows
By Matthew A. Russell
Released: April 2012
<http://shop.oreilly.com/product/0636920023227.do>

Updated just this month, it seems like the best resource on the subject. 
  I picked up a copy last week.

--
  Richard Gaskin
  Fourth World
  LiveCode training and consulting: http://www.fourthworld.com
  Webzine for LiveCode developers: http://www.LiveCodeJournal.com
  LiveCode Journal blog: http://LiveCodejournal.com/blog.irv