problem with nfs install

[Greg MATTHEWS]

i have copied the redhat 7.3 disks to a partition on my master node but i'm 
getting the following error on the node while trying to install by nfs:

VFS: Can't find ext2 filesystem on dev loop(7,0)


here is the start of my kickstart file:

lang en_US
network --bootproto dhcp
nfs --server 128.16.160.102 --dir /mnt/installimage
device ethernet eepro100
keyboard uk
zerombr yes
....

this works fine but if i change the --dir option to point to the partition 
with 7.3 cds copied to it (copied using cp -a /mnt/cdrom/Redhat /mnt2/7.3) 
then i get the error. the server is acknowledging the nfs mount request 
without complaint. both directories are exported in exactly the same way.

why is the error mentioning a loop device? why does the nfs mount fail - i can 
mount this from a ready-installed node.

tia

GREG