L2TP over IPSEC problem

Cisco 876
Hello, Dispite the fact that i am already bald, I would have been pulling my hair out over the last two days of struggeling with this issue. We have a Zywall 300 USG at the office, and i want to connect with my macbook pro via l2tp over ipsec. After a lot of trial and error and several user guides i have been able to setup the l2tp account. However i cannot get this to work, we have a Cisco 876 connected to our DSL, behind the cisco there is the Zywall USG 300 that functions as the vpn server and firewall. The cisco876 has a static route forwarding all traffic from its ethernet to the wan port of the zywall When i connect my laptop directly to the WAN port of the Zywall the VPN build up withouth a hitch, however when i try to connecto from the outside it gives me the error: Phase 2 local policy mismatch and no proposal chosen. I suspect there is something wrong with the config of the cisco 876, however i am not a cisco expert. So could somebody please have a look at my config and see if i maybe missed the obvious. Thanks in advance! Ammer Building configuration... Current configuration : 2363 bytes ! version 12.4 no service pad service tcp-keepalives-in service tcp-keepalives-out service timestamps debug datetime msec service timestamps log datetime msec service password-encryption service sequence-numbers ! hostname pasvision_cisco_876 ! boot-start-marker boot-end-marker ! logging buffered 51200 debugging logging console critical enable secret 5 xxxxxxxxxxxxxxx ! no aaa new-model ! resource policy ! clock timezone GMT 1 clock summer-time GMT date Mar 30 2002 1:00 Oct 26 2035 1:59 ip subnet-zero no ip source-route ip cef ! ! ip tcp synwait-time 10 no ip bootp server no ip domain lookup ip domain name pasvisionsbs ip ssh time-out 60 ip ssh authentication-retries 2 ! ! ! username xxxxxxx privilege 15 secret 5 xxxxxxxxxxxxxxx ! ! ! ! ! interface BRI0 no ip address encapsulation hdlc shutdown ! interface ATM0 no ip address no atm ilmi-keepalive pvc 0/33 encapsulation aal5mux ppp dialer dialer pool-member 1 ! dsl operating-mode auto ! interface FastEthernet0 ! interface FastEthernet1 ! interface FastEthernet2 ! interface FastEthernet3 ! interface Vlan1 description LAN-interface ip address ip nat inside ip virtual-reassembly ip tcp adjust-mss 1452 ! interface Dialer0 ip address negotiated ip nat outside ip virtual-reassembly encapsulation ppp dialer pool 1 dialer-group 1 ppp authentication pap callin ppp pap sent-username xxxxxxxxxxx password 7 xxxxxxxxxxxxxxxxx ! ip classless ip route Dialer0 ! no ip http server ip http authentication local no ip http secure-server ip http timeout-policy idle 60 life 86400 requests 10000 ip nat inside source list 101 interface Dialer0 overload ip nat inside source static interface Dialer0 ! access-list 23 remark TTY security access-list 23 permit access-list 23 remark Routit access-list 23 permit access-list 23 permit access-list 101 remark .-. ACL voor de nat netwerken access-list 101 permit ip any dialer-list 1 protocol ip permit ! control-plane ! ! line con 0 login local no modem enable line aux 0 line vty 0 4 access-class 23 in privilege level 15 login local transport input telnet ssh ! scheduler max-task-time 5000 scheduler allocate 4000 1000 scheduler interval 500 end

Software/Hardware used:
cisco 876 zywall 300 usg macbook pro

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