I've been able to fixed it, It happen that not only the ISCSI initiatior with MPIO installation is needed. I had to install the PowerVault Modular Storage Manager and choose the Host Installation. It says I need to install it on each host that will have access to the storage array, and it installs a storage agent and multipath driver.
Seems that its needed because I installed the PowerVault Modular Storage Manager with the host option only to update muy drivers and unistalled but the problem returned. So I'll nedd to leve installed this client on my servers.
Thank you for your help.