Arping not working

I recently changed to openhab2 and am struggling with getting my presence detection back to work.

I am followed the instruction on and installed

apt-get install iputils-arping

and gave it elevated access rights by

chmod u+s /usr/bin/arping

thus in the item properties I still see

uses_dhcp_listen	no
dhcp_state	No access right for port 67. Bound to port 6767 instead. Port forwarding necessary!
presence_detection_type	ARP_PING, ICMP_PING
uses_ios_wakeup	On
uses_arp_pings	no

and i don’t know what else to do

Please, someone know how to change the uses_arp_pings ?