communication problems in ping responses

[joey_4m]

Dear,

I am having a serious problem of communication
I'll explain the situation:

Serverweb - 192.168.17.14
Servervpn - 192.168.17.10

We have these 2 servers here in the center.
A web site to our network and a VPN for communication with the cooperatives.
For some reason unknown to me the following happens, the more I close the tunnel the VPN to communicate with the network 192.168.17.0/24 he can not ping with ip serverweb and also some computer use the gateway 192.168.17.14 cooperatives do not communicate.
Now comes the complicated part.
The server can not respond but ping workstations respond to ping normally.
We have already seen the firewall and answers to ping are released for each card.
Could anyone give any suggestions? If it is some configuration of VPN or firewall.
Ahhh, and only to complement, for 192.168.17.14 server to communicate with the cooperatives create a route, type: route add -net IP_COOPERATIVA gw 192.168.17.10