I can't reach the user but i can reach the Gateway

Dear All,

I create a lab in my home to training in Mikrotik, this simulation make 2 different subnets reach each other

Input
wan1 :192.168.0.1
wan2: 192.168.1.1

Output
Local1: 192.168.77.1
Local2: 192.168.88.1


The problem is that I cannot reach devices but I can only reach the gateways.

From 192.168.77.1 to 192.168.88.1 ping ok
From 192.168.88.1 to 192.168.77.1 ping ok

from 192.168.77.1 to 198.168.88.254 time request out
from 192.168.88.1 to 192.168.77.253 destination net unreachable

many thanks for your help and suppoort.