The Application Object Server cannot be marked as a Load Balancer while a member of the 'Non Load Balanced AOS Instance'

Hello,

I am trying to setup a load balancing cluster in AX2012. AX is automatically adding servers, but not allowing me to select a server as a load balancer. I receive the following message:

The Application Object Server cannot be marked as a Load Balancer while a member of the ‘Non Load Balanced AOS Instance’

I tried setting up a new cluster, but I cannot add/move servers in the form. I am admin for this system. Is this a bug in AX2012?

I have the similar setup AX2012 AOS clusters with a dedicated load balancer.

Would someone help and advise.