Problem mounting NFS home directories of NIS users.

Question

Only on one of client (rest on all clients working fine), the Local directories under /home is getting mounted instead of NFS shared home directories of NIS users. Able to manually mount the NFS shared directories but they also get automatically unmount after some ideal time. Want that the NFS shared directories gets automatically mount when the NIS user gets login as it is happening on all other clients.
Scenario:_
NIS user: user1
NFS Shared home directory: /export/home/user1 (which should get mount as /home/user1 when user1 gets login)
Local directory: /home/user1 (which is getting mounted when user1 is getting login)
[CLIENT]/--->ps -ef | grep automount
root 23369 1 0 Mar 19 ? 1:58 /usr/lib/autofs/automountd
[CLIENT]/--->cat /etc/auto_master
/xfn -xfn
/net -hosts -nosuid,nobrowse
/- auto_direct -intr
/- auto_home -intr
[CLIENT]/--->ypcat -k auto.home
/home/user1 NFS_SERVER:/export/home/user1
/home/user2 NFS_SERVER:/export/home/user2
[NFS_SERVER]-->cat /etc/dfs/dfstab
share -F nfs -d "user home dir" /export/home
[NIS_SERVER]--->cat /etc/auto_master
/xfn -xfn
/net -hosts -nosuid,nobrowse
/- auto_direct -intr
/- auto_home -intr
Please let me know if any other information is required.

Answer 1

add this entry as the first non-comment line in /etc/auto_master on the client:
+auto_master