Automatic add route after user connect

Situation

Branch-office > vpn router > internet > RRAS server > main office

user: vpn-branch
Tab Dial in:
Network access permission: Allow access
Assign static ip: an ip in the RRAS range 192.168.13.114
Apply static route: 192.168.14.0 MASK 255.255.255.0 Metric 1

Now the router setup the connection and got the right ip
In route print

______________________________________________________________

Network Destination        Netmask          Gateway       Interface  Metric
     192.168.14.0    255.255.255.0   192.168.13.114     192.168.13.2     23

_______________________________________________________________

when i ping a destination on the branch office there is a "General failure"

Now i run

route delete 192.168.14.0

route add 192.168.14.0 mask 255.255.255.0 192.168.13.114 metric 1

Network Destination        Netmask          Gateway       Interface  Metric
     192.168.14.0    255.255.255.0   192.168.13.114     192.168.13.2     24

Now everything works fine

So i need to recreate the route every time the vpn reconnect. what do i do wrong?

the full iptable

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0    WANGW    WAN      5
      WAN.0    255.255.255.0         On-link     WAN    261
    Branchoffice1  255.255.255.255         On-link     WAN    261
    Branchoffice1BC  255.255.255.255         On-link     WAN    261
    Branchoffice2  255.255.255.255    WANGW    WAN      6
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
     192.168.11.0    255.255.255.0         On-link      192.168.19.4    110
   192.168.11.255  255.255.255.255         On-link      192.168.19.4    266
     192.168.12.0    255.255.255.0   192.168.13.100     192.168.13.2     23
     192.168.13.1  255.255.255.255         On-link      192.168.13.1    266
     192.168.13.2  255.255.255.255         On-link      192.168.13.2    279
   192.168.13.100  255.255.255.255   192.168.13.100     192.168.13.2     24
   192.168.13.114  255.255.255.255   192.168.13.114     192.168.13.2     24
     192.168.14.0    255.255.255.0   192.168.13.114     192.168.13.2     24
     192.168.19.4  255.255.255.255         On-link      192.168.19.4    266
        224.0.0.0        240.0.0.0         On-link         127.0.0.1    306
        224.0.0.0        240.0.0.0         On-link      192.168.13.1    266
        224.0.0.0        240.0.0.0         On-link     WAN    261
        224.0.0.0        240.0.0.0         On-link      192.168.13.2    279
        224.0.0.0        240.0.0.0         On-link      192.168.19.4    266
  255.255.255.255  255.255.255.255         On-link         127.0.0.1    306
  255.255.255.255  255.255.255.255         On-link      192.168.13.1    266
  255.255.255.255  255.255.255.255         On-link     WAN    261
  255.255.255.255  255.255.255.255         On-link      192.168.13.2    279
  255.255.255.255  255.255.255.255         On-link      192.168.19.4    266
===========================================================================