It looks like you're having problems even connecting to the page from MMF, so the $service and so on variables don't yet come into it.
I would switch to using the Live Receiver object instead of Moosock, because it came out since I wrote the tutorial and it has a better chance at communicating with all servers because it handles the intricacies of the HTTP request for you. You can get it on this thread: http://www.clickteam.com/epicenter/ubbthreads.php?ubb=showflat&Number=99980&page=1 . Most of the tutorial still applies, but instead of using the giant list of actions on the Moosock object when you connect, all you have to do is "Start download (GET)" with the same URL that you have just now:
...and then use its "Data received" condition to react when the page responds. I think that the Live Receiver might have a lot more success with this.