PPTP server on Cisco 1900. What's wrong?

Question

VPN

Good afternoon.
I'm setting up a PPTP server on a Cisco 1900 router.
I can't understand what I did wrong, please tell me.
DHCP on server
Internal network - 10.10.10.1 - 10.10.10.254
White IP 13.13.13.14
GI0/1 - internal interface
GI0/0 - external interface
# vpdn enable
# user ADMIN password PASSWORD
# ip local pool VPN 10.10.10.240 10.10.10.250
# vpdn enable
# vpdn-group 1
# accept-dialin
# protocol pptp
# virtual-template 1
# exit
# interface virtual-template 1
# encapsulation ppp
# peer default ip address pool VPN
# ip unnumbered GI0/1
# no keepalive
# ppp authentication ms-chap-v2 chap ms-chap