Why can't I mount NFS ?

[Supote Leelasupphakorn]

Hi all,

   I want to export 
1. /mnt/xx/aa
2. /mnt/xx/bb
3. /mnt/xx/cc

from machine:A to machine:B. On B I can mount /mnt/xx/aa and
/mnt/xx/bb successful except /mnt/xx/cc, why or I missed 
something ? Below is some information may be useful.

--- /etc/export on machine:A ---
/mnt/xx/aa   -ro,quiet       B
/mnt/xx/bb   -ro,quiet       B
/mnt/xx/cc   -ro,quiet       B

--- output of `df -lh` on machine:A ---
/dev/ad1s1e   110G    29G    73G    28%    /mnt/xx/aa
/dev/ad2s1e   110G    29G    72G    29%    /mnt/xx/bb


TIA
Pote

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