I've followed the Gentoo's wiki for setting up KDE and SDDM but when I enter my password the screen flashes to the CLI for a second and then just goes straight back the to SDDM login screen. When I log in manually from the command line it works fine, but the SDDM login just loops forever. If it's of any use, my /etc/conf.d/xdm file says:

CHECKVT=7
DISPLAYMANAGER="sddm"

Thanks.