nfs not showing up in 'ps'

["Jack Byers" <byersj hotmail com>]

in my redhat6.2 system   nfs  doesnt show up  on  'ps ax' or 'pstree'

root corni /root]# pstree |grep nfs
[root corni /root]#
[root corni /root]# pstree |grep portmap
    |-portmap
[root corni /root]#
[root corni /root]# pstree |grep mountd
[root corni /root]#
only portmap shows up

but, nfs shows up in an 'S' link in rc5.d:
[jack corni rc5.d]$ ls *nfs*
S14nfslock  S60nfs
[jack corni rc5.d]$


=====
in contrast, on my other system with rhat 5.2
[byers byers d00rhmail]$ pstree |grep mountd
    |-rpc.mountd
[byers byers d00rhmail]$ pstree |grep nfs
    |-rpc.nfsd
$[byers byers d00rhmail]$ pstree |grep portmap
    |-portmap
[byers byers d00rhmail]$
all 3,  mountd, nfs, portmap,  are there.
======

I have tried to manually start nfs via
[root corni init.d]# /etc/rc.d/init.d/nfs start
just returns with no response
and nfs still doesnt show up in  'pstree'  or 'ps ax'

I am just beginning to experiment with nfs.
any advice?
thanks
Jack
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