iscsi multipath not working

[Avi_g]

Hi,

I've HP MSA 2000 with 2 controllers on it and 2 windows 2K8 R2 SP1 ENT config with HyperV cluster.

i've setup the cluster correctly but i've trouble with setup the iscsi multipath to work(failover to other NIC works good).

i can't set the multipath to work with round roubin, only with round roubin with subset,this method not use both iscsi nic at the same time.

i use the MPIO that built-in windows.

what i'm doing wrong here that i can't set it to work with both nic?

THX