My internet provider (Carnet) requires pptp for accessing Internet. They use infrastructure of other provider (Metronet). I have RouterBoard RB435G with RouterOS v5.12.
When i create PPTP in XP, internet works fine. Now i wanted to use Mikrotik so i can share same PPTP channel with multiple computers on network. Also i will need other VPN (vpn via vpn) on same RB to connect to Work Network, but this is next step.
Now my setup looks like this
Vpn Server(10.31.255.1) ---- ADSL Router (192.168.1.254) ---- (192.168.1.19/24)RB435G(192.168.2.1/24) ---- switch --- computers
as in:


Im able to connect to VPN Server, but after 60seconds the line is dropped. (I guess it timeouts)
After i receive IP address from PPTP DHCP server (ex. 31.147.144.48), In ROUTE LIST its is inserted that
Route to 10.31.255.1 is via 31.147.144.48 with distance 0
and im no longer able to ping VPN server (10.31.255.1). Also If i check Add Default Route then
0.0.0.0 is via 10.31.255.1 and it should be via 31.147.144.48
WinBox Screenshot Log Before PPTP
http://i.imgur.com/QFQ4Gh.png
During PPTP
http://i.imgur.com/uRcEbh.png

Attached is PPTP Debug Log
What am i doing wrong?
Thank you for Help.