Error During "Make Installworld"

[Kevin Greenidge]

I am using FreeBSD 4.9. Does anyone know what can be causing this? Here
is the error below: 
 
install: rename: /sbin/init to /sbin/init.bak: Operation not permitted
*** Error code 71
 
Stop in /usr/src/sbin/init.
*** Error code 1
 
Stop in /usr/src/sbin.
*** Error code 1
 
Stop in /usr/src.
*** Error code 1
 
Stop in /usr/src.
*** Error code 1
 
Stop in /usr/src.
*** Error code 1
 
Stop in /usr/src.