SIP-T20P: Register Failedand and no Call

[sylviog.jr]

Dear Daniel,

I have progress on VPN but believed that setting up the modem or access router , opening port 1723 for VPN connection, could connect at least one phone in each branch .
I have to test :

1 computer on my local network that would be the client.
I set up a VPN connection with public IP. Setup:
Geral: 177.134.30.106
Login : sylvio
Password: xxx
I visit the " yougetsignal " and tested the port 1723 (server). It´s open . I got the server remote address "177.134.30.106".

1 computer ( server ) connected to ADSL ( GVT in Brazil , only for testing ) ,
Modem:
DHCP: 192.168.25.2 to 192.168.25.240
Modem opening port 1723
Port forwarding port 1723 to ip PC 192.168.25.104 (router)
DMZ off
UPNP on
DDNS off

Router simulating a server:
Router IP : 192.168.0.1
DHCP: range 192.168.0.100 to 199
Virtual Server List :
Name: VPN
Application: PPTP
Port : 1723
Protocol: TCP
IP : 192.168.0.100

Config the input connection to VPN (server)
Login : sylvio (administrator)
Password: xxx
IP range 192.168.0.100 to 199 .

error:
error 800 the remote connection was not made ​​because the attempted vpn tunnels failed

If I can not solve this not be able to install the phones.

Please help me ,

Sylvio