Test all functionality with MarsEdit

I have been testing this and set it up according to the readme.txt but cannot get it to work. I used the Movable type API, API endpoint URL was automatically filled in but authenticating goes wrong: even with the right permissions Marsedit keeps asking me for a correct username/password.

When I check the API endpoint URL in my browser I get "XML-RPC server accepts POST requests only". I noticed when googling this can be quite a coomon issue with XML-RPC servers.

Hope this helps in debugging things,
Gerben