NIS transfer problem from Master to Slave

[Joe Astrologo]

Unable to transfer NIS db files to slave server.

Error from Master NIS Server.

root at admin01 yp]# make
gmake[1]: Entering directory `/var/yp/ohis'
gmake[1]: `ypservers' is up to date.
gmake[1]: Leaving directory `/var/yp/ohis'
gmake[1]: Entering directory `/var/yp/ohis'
Updating group.byname...
group.byname->admin02: Callback timed out
admin01.ohis.local: Master's version not newer
Updating group.bygid...


Error from slave server:

Sep 10 16:22:13 admin02 ypserv[23250]: refused connect from
10.0.57.222:900to procedure ypproc_xfr (ohis,
passwd.byname;-4)