Windows 2008 server with PPTP with radius ping 1 succ and other fails from outside

Hi team. i have a question i have 3 server with pptp with radius (VPN) i can access from outside from my windows 7 and access correct. BUT

when i do a ping to the VPN server 192.168.1.100 i have succefully results in all pings
but when i try to do a ping to the antother server in the lan of 192.168.1.100 (server) they show me only 1 ping succefully and the others TIMEOUT.
the same if i connect a windows 7 or anything in this LAN from outside only respnd 1 succefuly ping.
All firewalls are off

any ideas???
pietritoAsked:
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pietritoAuthor Commented:
any ideas?¿?
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