MS60 and MR60 on GS308 switch for backhaul - MS60 red light issue

want to put all my MS60's onto ethernet backhaul,  cables are cat5E (tested), router/satellites on firmware=v1.1.7.134_2.0.65.

connected the first satellite to ethernet like this and rebooted it:

MR60 ethernet -> GS308v3 switch <- MS60 (20ft cable run)

Result:
- light on MS60 is red
- http connect to MS60,  attached devices shows only wired devices

- http connect to MR60,  shows MS60 with good backhaul and wired
- phone app v2.3
   - shows MS60 offline
   - occasionally see a wireless devices connect to it

so it looks like MS60 cant use its ethernet port to backhaul to MR60 while using its wireless to fronthaul , guide says:
• Ethernet backhaul — For pre-wired homes, configure your network to use the ethernet for your backhaul and WiFi
for your fronthaul

I tried other MS60 same issue, read all the prev posts on here dealing with MR60/MS60 and backhaul / fronthaul issue not seeing any direct resolution for what I have described.

is there some other configuration I need to do other than putting them both on same switch ? 

thanks in advance.