ip-pre-up/ip-down script did not worked

[neo515]

I used pptp vpn client on centos6; and used chnroutes.py to create ip-pre-up/ip-down. but when i try to connect the vpn server , it did not creat route table .
anybody can help me ? thanks

##########################################
// on vpn server host
#cat /etc/pptpd.conf
option /etc/ppp/options.pptpd
logwtmp
localip ... # (type passwd to view)
remoteip 192.168.100.2-100

#cat /etc/ppp/options.pptpd
name pptpd
refuse-pap
refuse-chap
refuse-mschap
require-mschap-v2
require-mppe-128
ms-dns 8.8.8.8
ms-dns 8.8.4.4
proxyarp
debug
lock
nobsdcomp
novj
novjccomp
nologfd

#/etc/init.d/pptpd start
#tailf /var/log/messages
Jul 12 11:31:08 10-19-46-62 pptpd[5787]: MGR: Maximum of 100 connections reduced to 99, not enough IP addresses given
Jul 12 11:31:08 10-19-46-62 pptpd[5788]: MGR: Manager process started
Jul 12 11:31:08 10-19-46-62 pptpd[5788]: MGR: Maximum of 99 connections available

// vpn server start Normally

######################################
// on vpn client host
#ll /etc/ppp/ip-pre-up /etc/ppp/ip-down.d/ip-down
-rwxr-xr-x 1 root root 201698 Jul 11 17:34 /etc/ppp/ip-down.d/ip-down
-rwxr-xr-x 1 root root 359983 Jul 11 17:40 /etc/ppp/ip-pre-up
#cat /etc/ppp/options.pptp
lock
noauth
refuse-pap
refuse-eap
refuse-chap
refuse-mschap
nobsdcomp
nodeflate

#pptpsetup --create myvpn2 --server 12.34.56.78 --username testuser --password sscnwxy --encrypt --start
Using interface ppp0
Connect: ppp0 <--> /dev/pts/0
CHAP authentication succeeded
MPPE 128-bit stateless compression enabled
local IP address 192.168.100.2
remote IP address 12.34.56.78

#ifconfig
......
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 0 (Local Loopback)
RX packets 5935 bytes 854648 (834.6 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 5935 bytes 854648 (834.6 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

ppp0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1496
inet 192.168.100.2 netmask 255.255.255.255 destination 12.34.56.78
ppp txqueuelen 3 (Point-to-Point Protocol)
RX packets 6 bytes 60 (60.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 6 bytes 66 (66.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
......

#tailf /var/log/message
Jul 12 11:44:10 worker0 pppd[25793]: pppd 2.4.5 started by root, uid 0
Jul 12 11:44:10 worker0 pppd[25793]: Using interface ppp0
Jul 12 11:44:10 worker0 pppd[25793]: Connect: ppp0 <--> /dev/pts/0
Jul 12 11:44:10 worker0 pptp[25794]: anon log[main:pptp.c:333]: The synchronous pptp option is NOT activated
Jul 12 11:44:10 worker0 NetworkManager[969]: [1499831050.1592] manager: (ppp0): new Generic device (/org/freedesktop/NetworkManager/Devices/360)
Jul 12 11:44:10 worker0 pptp[25804]: anon log[ctrlp_rep:pptp_ctrl.c:254]: Sent control packet type is 1 'Start-Control-Connection-Request'
Jul 12 11:44:10 worker0 pptp[25804]: anon log[ctrlp_disp:pptp_ctrl.c:754]: Received Start Control Connection Reply
Jul 12 11:44:10 worker0 pptp[25804]: anon log[ctrlp_disp:pptp_ctrl.c:788]: Client connection established.
Jul 12 11:44:11 worker0 pptp[25804]: anon log[ctrlp_rep:pptp_ctrl.c:254]: Sent control packet type is 7 'Outgoing-Call-Request'
Jul 12 11:44:11 worker0 pptp[25804]: anon log[ctrlp_disp:pptp_ctrl.c:873]: Received Outgoing Call Reply.
Jul 12 11:44:11 worker0 pptp[25804]: anon log[ctrlp_disp:pptp_ctrl.c:912]: Outgoing call established (call ID 0, peer's call ID 0).
Jul 12 11:44:14 worker0 pppd[25793]: CHAP authentication succeeded
Jul 12 11:44:14 worker0 pppd[25793]: MPPE 128-bit stateless compression enabled
Jul 12 11:44:14 worker0 pppd[25793]: local IP address 192.168.100.2
Jul 12 11:44:14 worker0 pppd[25793]: remote IP address 12.34.56.78