NFS server setup

I am trying to setup an NFS Server on a QNX to be accessed by a windows machine.

How do I do it?
I have setup my /etc/exports
But when I try to run the following I get:

rpcbind

sh: rpcbind: not found

nfsd

sh: nfsd: not found

Why? What shall I do next?

Thanks

What version is your QNX? (uname -a)

On 6.3.2, both binary under /usr/sbin/

Which suggests logging in as root to do this.