Avamar Image Level Proxy Backup with vStorageAPI OVF

Keep getting the following error when I try and run a backup policy for a Image level proxy backup of a VM...

Description: Failed to initiate a backup or restore for a virtual machine because no proxy was found to service the virtual machine.

Remedy: Check that proxy clients have the desired datastores checked for protection. The proxy client datastores checked must match datastores for virtual machines requiring protection. For scheduled group backups additionally verify that the group has desired proxies checked for protection of virtual machines belonging to the group. Verify proxy clients are powered on, enabled, and registered. For restores, verify there is an available proxy in the destination datacenter.

I've checked these settings quite a few times and they all look good, can anyone think of anything not in the offical documentation?

Look forward to you replys...

Cheers,

Craig.