GSM7328s VLAN connection with ReadyNAS 4200

Hi, 

I am having a bit of trouble trying to configure a ReadyNAS 4200 for iSCSI connections to VMware.  I have a GSM7328s, an M5300 and a ReadyNAS 4200.  I have configured a VLAN (20) on each Netgear switch and configured routing on the VLAN using 10.10.10.0/24 IP address range and have connected the ReadyNAS using Ethernet 3 (10GB) to the M5300 and Ethernet 4 (10GB) to the GSM7328s. I have configured IP addresses on those NICS in the range 10.10.10.0/24

But nothing is talking to each other, I cannot ping the ReadyNAS from either switch and when I select the VLAN ID 20 on the ReadyNAS the nic changes to DHCP rather than static, or at least I don;t seem to be able to have both ethernet 3 and 4 using static IP addresses, it's all a bit weird.

Basically what I am trying to achieve is a VLAN for iSCSI traffic from our datastore to the vmware hosts through 2 switches (for redundancy) but it just doesn't seem to be working.  This is my first attempt at VLAN's so I am somewhat in the dark, though I do uinderstand the principals of VLANs..i think.

Any help or advice to point me in the right direction wiould be appreciated.

Dean