Install xrdp server in KDE but it doesn't work

I have already installed xrdp and xorgxrdp in my manjaro.

yay -S xrdp xorgxrdp           

and it looks don’t work.

When i connect it in windows10,it just a black window.

what shoud i do.
I have already read ArchWiki,and do what is say,but didn’t work.

Installing a server won’t start it. You need to systemctl start ... the appropriate service. Use systemctl enable --now ... if this should start on every boot.

I have already do it,but still didn’t work.

I can see login view at first, bu when it get into deskop it’s turn to black again.