Some Linux RDP client does not work, have no time to fix bug, report bug.
Work around
xfreerdp winterser.dai-lab.de.rdp
The config file:
dang@gt130:~> cat winterser.dai-lab.de.rdp # winterser.dai-lab.de.rdp redirectclipboard:i:1 redirectprinters:i:1 redirectcomports:i:0 redirectsmartcards:i:1 devicestoredirect:s:* drivestoredirect:s:* redirectdrives:i:1 session bpp:i:32 prompt for credentials on client:i:1 server port:i:3389 allow font smoothing:i:1 promptcredentialonce:i:1 videoplaybackmode:i:1 audiocapturemode:i:1 full address:s:winterser.dai-lab.de workspace id:s:winterser.dai-lab.de username:s:dang