RHEL 6 and NFS

Dear list,
  we have a basic kickstart system that works with RHEL 4 and RHEL 5,
but is failing with RHEL 6. We boot the machines from CD/DVD and then
type 

linux ks ksdevice=ethX [where X is the relevant number]

The IP is set by DHCP and using

filename "/export/n_os/ks/";
next-server 11.22.33.44;

where 11.22.33.44 is an NFS server and /export/n_os/ks/ the directory
containing kickstart files of the form 22.33.44.55-kickstart

When we do this for RHEL 6 we get an error downloading kickstart file
message. If we enter the location e.g.

 nfs:11.22.33.44:/export/n_os/ks/22.33.44.55-kickstart

the ks file is read. [Putting the ks file location explicitly on the
command line also works]

Am I missing something?

thanks

iain



-- 

Iain Morrison
IT Manager
MRC Epidemiology Unit
Institute of Metabolic Science
Box 285, Addenbrooke's Hospital
Hills Road
Cambridge
CB2 0QQ
Tel 01223 769200