Remote Desktop from Windows to Debian on AWS?

I need to set up a Remote Desktop connection from Windows 8 to a Debian instance running on AWS. I've tried modifying the Ubuntu instructions from AWS, replacing the ubuntu-desktop with task-desktop. When I connect sesman tells me

connecting to sesman ip 127.0.0.1 port 3350
sesman connect ok
sending login info to session manager, please wait ...
xrdp_mm_process_login_response: login successful for display ..
started connecting
connecting to 127.0.0.1 5910
error - problem connecting

There's nothing helpful in /var/log/auth.log or /var/log/xrdp-sesman.log.

What am I missing here?