Running metapost successfully on www-servers, now trying to get it to run in our intranet environment, the following Error occurs when trying to connect in the last step (User / Login is already passed):
Servererror - The server encountered an error in following URL:
http://intra.ourdomain.de/metapost.ashx?key=text/html
503 Service Unavailable
Using DNN 4.9.0, Single Sign-on (NTLM trust), metaPost 1.34 or 1.33 no difference.