http POST request returns error code 33 (Read 25 times)

Requesting a little code writing help.  I've been trying to make some changes to my RunningAhead data using an http POST request from Google App Script (inside a Google Sheet).  So, for example, I want to create a slew of new courses using course names and whatnot that are in the Google Sheet.  I keep getting error code 33 (User denied access), which is kind of strange because http GET requests work just fine, so I know I am using the correct credentials.  I've also posted successfully using the same code snippet to http://posttestserver.com/post.php, so I know that Google App Script can successfully POST the data.  Not sure what I'm doing wrong.  If anybody has any experience with this I'd appreciate the help.

Thanks.

EDIT:  Sorted it out.  Nothing to see here.  Move along.