Vlans and different subnets behind red 20

Hi following setup, simplified to explain

an UTM on an sg320 with a red sd-20

managed switch with vlans on main side

managed switch behind red with vlans

red is setup in split mode

Main office ( vlan 1 ) 

remote side behind red ( vlan 1) managed by UTM

remote side second vlan ( vlan 1001)

created a red vlan device with vlan 1001 with IP Address

have a device in this vlan (

from the  utm I can access the but I cannot access from Main office

i have created static routes entry in UTM but it does not work