Backup Oracle - Linux RH - Error - Please Help

Hi gurus,

Im trying to run an FULL ONLINE backup to an NFS filesystem an getting this error:

BR0301E SQL error -1580 at location BrCtlCopy-1, SQL statement:

'/* BRBACKUP */ ALTER DATABASE BACKUP CONTROLFILE TO '/oracle/CDP/sapbackup/cntrlCDP.dbf''

ORA-01580: error creating control backup file /oracle/CDP/sapbackup/cntrlCDP.dbf

ORA-27054: NFS file system where the file is created or resides is not mounted with correct options

Additional information: 3

BR0320E Copying of control file to /oracle/CDP/sapbackup/cntrlCDP.dbf failed

BR0314E Collection of information on database files failed

At the ALERT.LOG:

/* BRBACKUP */ ALTER DATABASE BACKUP CONTROLFILE TO '/oracle/CDP/sapbackup/cntrlCDP.dbf'

Tue Oct 20 00:03:43 2009

WARNING:NFS file system /oracle/CDP/sapbackup mounted with incorrect options

WARNING:Expected NFS mount options: rsize>=32768,wsize>=32768,hard,

ORA-1580 signalled during: /* BRBACKUP */ ALTER DATABASE BACKUP CONTROLFILE TO '/oracle/CDP/sapbackup/cntrlCDP.dbf'...

On the host /etc/exports

/sapbackup *(rw,sync,no_wdelay,insecure_locks,no_root_squash)

On the DB Server:

mount -t nfs 132.145.161.50:/sapbackup /oracle/CDP/sapbackup/ -o rw,bg,hard,nointr,tcp,vers=3,timeo=300,rsize=32768,wsize=32768

Can anyone help me please?

Thanx a lot!!!

Regards

MJ