VMware Support & NO_ROOT_SQUASH

I used the IP address of my ESX host which is 192.168.1.230. I was able to get around this issue by using one of the shares the ReadyNAS Duo came pre-configured with. It's a share called "backup" and has NFS selected as one of the protocols. I just renamed that share to something more descriptive for what I need (datastore2). My ESX host was then able to connect to this share. But I was unable to create a new share and select the NFS protocol. Why is that??? I would like to be able to do that in case I need to create more NFS shares in the future. Thanks in advance for your help.