How can I Replace Lock screen on menu with xflock4

[ahmed4119]

I removed light-lock because I didn't want it anymore as it's not that useful for me and i want to replace it with xscreensaver and xflock4 so after removing it , the lock screen icon in the Lite menu greyed out and isn't reactive anymore, It doesn't do anything. So I want to know if there's a way to replace what it used to do with Light-locker and do it with xflock4 ??