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

Export: Release 11.2.0.3.0 - Production on Wed Mar 5 15:07:57 2014

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Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
ORA-39000: bad dump file specification
ORA-31641: unable to create dump file "/mksysb/collect_export_05032014/ahbcollect_05032014.dmp"
ORA-27054: NFS file system where the file is created or resides is not mounted with correct options
Additional information: 5
Additional information: 18

Mount as follow:
mount -o rw,bg,intr,hard,timeo=600,wsize=32768,rsize=32768  nim_server1:/mksysb /mksysb