Problem with shared storage permission in NFS

[sesemi]

Dear all
Hi
I have a NFS server which is configured to work with shared storage. I mount it with the following command:

#mount -o remount,rw,hard,nointr,vers=3,tcp,timeo=300,rsize= 32768,wsize=32768,acttimeo=0, x.x.x.x:/SharedFolder /SharedFolder

the etc/fstab configuration for this mount point is as follow:

x.x.x.x:/SharedFolder /SharedFolder nfs remount,rw,hard,nointr,tcp,vers=3,timeo=300,rsize= 32768,wsize=32768,actimeo=0 0 0

I have a web service which is deployed in weblogic9.2 that is working with this shared storage on the nfs client.
The problem is that the folder on the shared storage loose its permissions occasionally. Although it is still mount I can not either change directory to the folder. I get permission denied error and the output of ls -l is as follow:

?------------ ? ? ? ? ? SharedFolder

The output of mount command:
x.x.x.x:/SharedFolder /SharedFolder type nfs (rw,hard,nointr,nfsvers=3,tcp,timeo=300,rsize=3276 8,wsize=32768,actimeo=0,addr=x.x.x.x)

if I remount the partition the problem is solved but it may happen again an hour later.



Please note to the attached file too.
Thanks alot