MMM-PIR not working when install xscreensaver

[MagicM]

Hello

First, my English is not good.
I beg your understanding even if it doesn’t fit the rules of the word.

PIR-Sensor is worked well. but after a long time, the screen turned off because of the screen saver.
so I installed an xscreensaver on my raspberry pie.
And I turned off the screen saver.
The MMM-PIR-Sensor has not worked since.
PIR does not work even if xscreensaver is deleted.