Memcached Memcached Socket on Centmin Mod

I've just had to set the same myself. 755 doesn't work, 766 works.

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Yeah, same digits, wrong order

 

please help
changed permission and added the server to 2 and still not working

Code:

Dec 27 01:28:22 centos-7-1 su[2300]: pam_unix(su:session): session opened for user railgun by (uid=0)Dec 27 01:28:22 centos-7-1 su[2300]: pam_unix(su:session): session closed for user railgunDec 27 01:28:22 centos-7-1 railgun[2277]: Error activating: Activation bypassed: Error making request: 400 Bad RequestDec 27 01:28:22 centos-7-1 systemd[1]: Removed slice User Slice of railgun.-- Subject: Unit user-995.slice has finished shutting down-- Defined-By: systemd-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel-- -- Unit user-995.slice has finished shutting down.Dec 27 01:28:22 centos-7-1 railgun[2277]: [FAILED]Dec 27 01:28:22 centos-7-1 systemd[1]: New main PID 2302 does not exist or is a zombie.Dec 27 01:28:22 centos-7-1 systemd[1]: Failed to start LSB: Railgun listener.-- Subject: Unit railgun.service has failed-- Defined-By: systemd-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel-- -- Unit railgun.service has failed.-- -- The result is failed.Dec 27 01:28:22 centos-7-1 systemd[1]: Unit railgun.service entered failed state.Dec 27 01:28:22 centos-7-1 systemd[1]: railgun.service failed.Dec 27 01:28:22 centos-7-1 sudo[2270]: pam_unix(sudo:session): session closed for user rootDec 27 01:28:22 centos-7-1 polkitd[542]: Unregistered Authentication Agent for unix-process:2271:72942 (system bus name :1.42, object path /org/freedesktop/PolicyKit1/AuthenticationAgelines 2319-2367/2367 (END)