Full level backups using the 'SAN' transport mode fails. Incremental backup works.

Error messages log:

suppressed 2196 bytes of output.

Performing a FULL Image level backup.

Creating a quiesced snapshot for 'PROD-InCodeReview'.

11/19/14 15:03:21.669265 Creating snapshot for 'vm-37' ...

11/19/14 15:03:21.731665  Task is -1% complete

11/19/14 15:03:21.747265  Task is 10% complete

11/19/14 15:03:22.745672  Task is 20% complete

11/19/14 15:03:23.744078  Task is 30% complete

11/19/14 15:03:24.742484  Task is 40% complete

11/19/14 15:03:25.740891  Task is 50% complete

11/19/14 15:03:26.754897  Task is 60% complete

11/19/14 15:03:27.753304  Task is 70% complete

11/19/14 15:03:28.611309  Task is -1% complete

The snapshot was created successfully for VM 'PROD-InCodeReview'.

Downloading VM configuration for PROD-InCodeReview.

Configuration downloaded successfully for VM 'PROD-InCodeReview'.

Following are the details of the client PROD-InCodeReview:

VirtualCenter : 172.16.9.1

ESX Server : tpvm56.fglife.com.tw

DataCenter Name : FGLIFE

ConfigDatastore Name : V7000_6TB

Resourcepool Name : /

Following is the disk information of the client PROD-InCodeReview:

Disk 1 Label : Hard disk 1

Disk 1 Size : 50.0 GB

Disk 1 Datastore name : V7000_6TB

Total Number of Disks : 1

Obtained the virtual disks for the VM.

Change block tracking is disabled for VM: PROD-InCodeReview

File level Recovery from Image level backup is enabled.

MORef for the VM is obtained.

Obtained the virtual disks for the VM.

83510:nsrvadp_save: Requested transport modes "san" unavailable, only "nbd" available. Please change transport mode to "nbd" and retry backup.

90258:nsrvadp_save: The requested transport modes 'san' is unavailable. Exiting.

Cleaningup VADP mount operation.

11/19/14 15:03:35.334952 Deleting snapshot for 'snapshot-424' ...

11/19/14 15:03:35.366153  Task is -1% complete

11/19/14 15:03:35.849756  Task is 50% complete

11/19/14 15:03:36.052557  Task is 100% complete

11/19/14 15:03:36.411359  Task is -1% complete

Snapshot for VM PROD-InCodeReview is deleted.

Temporary directory 'D:\mnt\PROD-InCodeReview' for VADP deleted.

PROD-InCodeReview:*FULL*: retried 1 times.

Temporary workaround:

VADP_Disable_FLR=yes

but..I need to file level restore!!