VDP 6.0.2 - Missing gear icon for adding Data Domain

Hi all.

We have deployed a VDP 6,0.2 over a vSphere 5.5 on which we will integrate a Data Domain as storage for backups.

However, after going to the storage tab there is no "gear icon" to get action list such as "Add Data Domain".

We are running vCenter Server / ESXi hosts 5.5,

We have and up to date Adobe Flash Player Plugin installed

We have tested from different browers above the release requested in the documentation:

Microsoft Internet Explorer 10.0.19 and later.
Mozilla Firefox 34 and later.
Google Chrome 39 and later.

We don't know what can be failing, but at the end as we cannot see the icon to add Data Domain, this integration cannot be done.

Do you have any suggestion/idea what can we do?

Thanks in advance.