Trying to create shared storage via iSCSI. Storage not showing on second ESXI host

I have created a iSCSI lun and gone through the process of adding it to my first ESXI host.It displays fine in storage adapters -> details and I can also add it as a datastore.

When i try and do the same thing on my second ESXI host, the iSCSI does not appear under storage adapters -> details (although the properties are correct in the iSCSI software adapter settings) and I can't add it as a datastore.

If i compleatley remove it from the first host I can then add it to the second, but (I think) need it in both hosts to use shared storage?

Am I doing something wrong?

Thanks