"forwarding-options helpers bootp " is old DHCPD config and "forwarding-options dhcp-relay server-group" is the new JDHCPD config. You cannot have both running simulataneously . Either DHCP config or JDHCP config, for 12.1X versions JDHCP is recommended.
You dont need "set forwarding-options helpers bootp server 10.64.40.17" the remaining config looks good and expect to work.
Are you getting any issues?
show dhcp relay statistics
show dhcp relay binding
