VPN through Cisco 827 / 837

Hello i am having avery bizare problem,
i am setting up a vpn connection, as follows :


WINXP---->CISCO827ADSL---->INTERNET---->CORPORATE

i am using the windows XP VPN client to connect to my corporate server .

when i am using a normal modem (ALCATEL speedstoucvh pro etc ) i can connect without any porblems.

but when i connect my cisco router, it just dont work.
i have tried with cisco 827 ans cisco 837, it just wont work .

i started a configuration from scratch, it worked for some time, but then it just stopped, i switched my alcatel back and it worked, put cisco back again NOT WORKING.

here is my router config:

Building configuration...

Current configuration : 1166 bytes

version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption

hostname VPN_RTR

ip subnet-zero

ip audit notify log
ip audit po max-events 100




interface Ethernet0
ip address 192.168.1.1 255.255.255.0
ip nat inside
no ip mroute-cache
hold-queue 100 out

interface ATM0
bandwidth 1025
no ip address
no ip mroute-cache
no atm ilmi-keepalive
pvc 8/35
encapsulation aal5mux ppp dialer
dialer pool-member 1

dsl operating-mode auto
dsl power-cutback 1
hold-queue 208 in

interface Dialer0
bandwidth 1024
ip address negotiated
ip nat outside
encapsulation ppp
dialer pool 1
no cdp enable
ppp authentication chap callin
ppp chap hostname promau@tplus
ppp chap password 0 ******

ip nat inside source list 8 interface Dialer0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer0
ip http server


access-list 8 permit 192.168.1.0 0.0.0.255

scheduler max-task-time 5000
end

 

WARNING: You Posted a Password that was in your config file please be aware u may have just enabled access to what ever promau@tplus is.

 

Did you mask it out, because it's masked out now.

Are you noticing a lot of people joining here lately with heavy tech questions? I wonder what's up with that?

 

i did notice that, dunno why that'd be though. "The truth is out there" Thank god it isn't in here with us hey

 

man i hardly know anything about routers and i could answer some of these questions, in fact i dont even have a router, i have palayed around with my friends web based admin that it :|, some ppl might find there answers lye within there manual.

 

I have a router and a Cisco firewall and all that, but I can't even pretend to know very much about the real technical details of networking, that's never been a strong suit of mine.

 

i can try to help yo out with some cisco stufss...so no clues for me ??

 

Who me? No, no clues at all, color me clueless I'm afraid.

 

hey did u chek if the ADSL you are using is PPPoE or PPPoA..because looks like the config you are using is PPPoA but if your telco is offfering PPPoE this config might not work..let me know after you try.