FortiManager not loading IPS Signature database

[Anne]

Hi

We have run into this issue where our FortiManager is not loading the IPS Signature database.

If I create an IPS Sensor in FMG, I get -1 as matched Signatures.

I am running 5.2.4 on FMG and 5.2.6 on the Fortigates.

Please help.

Thanks

Anne