Reach IPSec Clients over vlan

[networking]

Hello,

we build some vlans, the vlans are working fine and can reach all other Clients on the network (also the Static Routes Clients).
But when i want ping a PC from a vlan to the IPSec Routes it can't find the Route? Where can we set or what is to do so that the vlan GW knows where the IPSec GW (Route) is to find. The Rules on both Site are * ALL.