routing pb with virtual access VPDN

hi

i have big trouble with VPDN !! i can ping from my R1 router all ip addres on my CPE or lan behind him but i cant ping from router connected on LNS it seem that LNS dont route packets to virtual acces wen i ping from cpe lan icmp arrive on destination but on back, they are blocked by LNS is there one limitation from vpdn ? i dont have any acces rules

please help, i dont find error since two days !!!

thanks for your assistance,

R1#show vpdn

L2TP Tunnel and Session Information Total tunnels 1 sessions 1

LocID RemID Remote Name State Remote Address Port Sessions

LocID RemID TunID Intf Username State Last Chg Fastswitch

% No active L2F tunnels

% No active PPTP tunnels

LNS :

------------------------------------------------------------ vpdn enable ! vpdn-group 1 accept-dialin protocol l2tp virtual-template 1 terminate-from hostname TGT1 local name LNS1 lcp renegotiation always l2tp tunnel password 7 12110203 source-ip 222.103.2.41 ! interface Virtual-Template1 mtu 1492 ip unnumbered Loopback0 keepalive 3 ppp accounting authlist_ppp ppp chap hostname LNS1 ppp multilink ! interface Loopback0 ip address 222.103.2.41 255.255.255.255 !

conf CPE :

------------------------------------------------------------------------ interface Dialer1 mtu 1492 ip unnumbered Ethernet0 encapsulation ppp dialer pool 1 dialer remote-name redback dialer-group 1 keepalive 3 10 no cdp enable ppp authentication chap pap callin ppp chap hostname snipped-for-privacy@bobigny.tgt.cttl.cdsl ppp chap password 0 bobigny ppp pap sent-username snipped-for-privacy@bobigny.tgt.cttl.cdsl password 0 bobigny ! router rip version 2 network 10.0.0.0