how to load sles in redhat platform using sles image created in nfs server
 

I am trying to install sles10 on a system with redhat paltform
using sles10 image created in NFS server.
when i insert the first cd n choose the option to install from NFS giving its IP address...it gives an error saying " That directory cannot be
mounted from the server "

do i need to install some extra packages in NFS server to workout with this installation using NFS image...