I assume this is a route based vpn based on the output. It looks like you are missing the route into the tunnel interface.
sydneyrd-ssg5-> get route ip 192.168.2.0 Dest for 192.168.2.0 -------------------------------------------------------------------------------------- trust-vr : => 0.0.0.0/0 (id=15) via 210.8.1.232 (vr: trust-vr) Interface ethernet0/1 , metric 1
The remote network 192.168.2.0 is hitting the default route. Create a route with the tunnel interface as the next hop for the 192.168.2.0/24 network.