vCD - How to mount a NFS for transfer area

Hi

Our v5.12 vCD is running on Redhat 6, one of the recommended OSs.

The existing /data/transfer area is too small and we wanted to mount an NFS area on Server 2012 which is set to allow unmapped unix access.

A windows NFS client can see the area.

When a mount -t nfs ourip:/vcd_transfer /opt/vmware/vcloud-director/data/transfer

is done we get a "mount system call fail"

>> Does anyone have some tips on how to get this to work or the gotchyas to look for ?

I have attached the default installed services.

Thanks