[I got so frustrated that I spent a lot of time searching for a replacement - it's installed, and not bad - but no calendar listing of posts, which is a drag...]
There was no error message - when called, as shown above, the script showed as text!!
That's why I'm thinking "server", since all worked fine locally (yes, params were changed for uploading, but you know what I mean).
Any suggestions? (It's still laying around here, somewhere...)