nfs question

Hi,


I have a kerberised RHE4 server with a mount point.

my /etc/export looks like the following:
/mymountpt *(rw,sync)

I have portmapper and nfs service running via the services.
When I run showmount I see:
showmount --exports localhost
Export list for localhost:
/mymountpt *


I made a directory /root/mnt
If I do a mount mount localhost:/mymountpt /root/mnt
I get:
mount: localhost:/mymountpt failed, reason given by server: Permission denied


In /var/log/messages I get:
mypc: rpc.mountd: authenticated mount request from localhost.localdomain:638 for /mymountpt (/mymountpt)



The firewall is disabled and the selinux is non-enforcing.


This is really stumping me. Is it something related to pam, kerberos, ldap?

thanks in advance

tiffini