FMG as a FDS server doesnt work

Hi there

We have a FGT cluster registered to FMG. We would like to use FMgas a FDS server for the FGT. I have used the following link to configure that:

http://docs.fortinet.com/uploaded/files/2153/LicensingIsolatedFortiGates.pdf

The FMG doesnt seem to be updating the licensing information on the fgt. Under License Information on FGT, i see IPS and application control as Not Registered, AV as unregistered & even Web Filtering as Unreachable.

Please help.