[ovirt-users] No Host listed when trying to create a Storage Domain

I'm trying to create a new storage domain, I've successfully created a new "Data Center" and Cluster with no issues during the process. However, when I try to created a new storage domain the pull down menu bar is blank. Therefor, I'm unable to create a new storage domain. What might I have missed or not configure properly to prevent the menu bar from getting populated? Thanks