litespeed ver. 5.1.17

Hello ! I'm using litespeed webserver 5.0.17 with directadmin. when i update the litespeed to 5.1.17 by "custom build 2", after 10 minutes the litespeed goes down and non of my sites runs. I have to restart litespeed and the problem appear after 10 to 20 minutes after restarting. so i have to...