Can't ping router on the other side of the VPN tunnel

I have a ubiquiti Edge Router PoE unit. I have a VPN tunnel setup from the remote office to the main office.

Remote Office : 192.168.29.0/24
Main office: 192.168.1.0/24

When I ping 192.168.1.1 it responds ok
When I ping 192.168.1.2 or .4 they also respond.
But if I try to ping a router on the main office LAN from the .29.0 network, the router does not respond.

The secondary router has a internal IP of 192.168.1.10

If I am on the Main network lan, 192.168.1.0, I can ping the 1.10 host just fine (router)
On the other end of the router, is a network range of 10.0.1.0/24

The host I need to talk to from the 192.168,29.0 network is 10.0.1.125.

If I RDP to our terminal server on the local 192.168.1.0 network, I can see the 10.0.1.125 host just fine and I can remote in.
If I try to RDP directly to 10.0.1.125, I get no response.

ping is not blocked over the VPN.
Again, ping works from the main office lan to the 1.10 appliance. it's only coming in over the VPN that won't respond.

Main office Router : Netgear FVS336G
Remote office Router: Ubiquiti EdgeRouter PoE

I have firmware 1.10.8
is the issue on the remote office end or the main office end do you think? Any tips for how I can be able to ping over the Tunnel and have the traffic actually go over the tunnel?

I don't see a force all traffic over the VPN option.