VNX 5200 Block - Waiting at discovering forever

VNX 5200 Block - Waiting at discovering forever

Hi,

Opstor server runs on a VM in ESX5.5. EMC VNX is connected to ESX host via fiber on fabric interconnect ports so there is no dedicated host-bus adapter between the storage and the VM.

I am using 9.1.2 which is the latest version, having done all the prerequisites, I am stuck at the step "Discovering". I have left the server run all night but still nothing. I am able to get data from the following command on the opstor server :  naviseccli -h <array name> -scope 0 -user <storage system username> -password <storage system password> getall

I have restarted, shotdown/started the server, upgraded java, nothing helps. Any help is appreciated. thx