VPN, PPTP-server. Can not Ping local computers behind MT.

MT v.2.9.6 with PPTP-server on my office.
I connect from my home computer to the office using PPTP with no problems. I can ping pptp-server but can not ping other computers in my office. No browsing with \ip address.
Proxy ARP is enabled on my Local interface of the MT.
Where might be the problem?

Here’s my configuration:

[admin@GSW] ppp secret> print detail
Flags: X - disabled
0 name=“" service=pptp caller-id=“” password="***” profile=default-encryption
local-address=192.168.0.202 remote-address=192.168.0.88 routes=“” limit-bytes-in=0
limit-bytes-out=0

Please use the latest version.