Some routes missing ?

Hello,
I have MT 2011 as gateway on address 192.168.88.1., and it uses NAT from PublicIP to network 88.0/24
Network is 88.0/24
I have few SXT 5 ac as AP, on same network 88.0
Users are on same network 88 (DHCP Clinet on wlan), and they have NAT, from 88 to some irrelevant network.
My dude is on address 88.248, and from The dude PC I can’t ping user on 88.210.
Internet is working for these users, but dude Can’t see them
Why ?

Solved. UAC on win7 was making problems.
Ty