No VMAC address on cluster interface

[FortiFan]

Hi Everyone

I've created a new interface with the Cluster Network Type in a ClusterXL environment, but the virtual IP doesn't have a MAC address, so the clients connected to that network can't talk to anything outside of their VLAN, as the virtual IP is their standard gateway. They can however reach the member IP's that are configured on the two cluster members. 

I've run the command "cphaprob -a if" on the CLI and I don't see the interface that I created there.

I've created the interfaces on the two appliances on the gaia Web GUI and then created the interface for the virtual IP on the SmartConsole, and then I installed a policy on the device. 

I hope my post makes sense, as it's the first time in my career working with Checkpoint.

Can someone guide me a little on how to find out what I did wrong? 

Thanks.