Newbie and stuck!

Hi I have a Cisco 877 wireless router.
I have upgraded the firmware as the original version would not allow
connection to a BT line, lol.
I can get an ADSL connection and the connection test is successful.
I have set up the router IP address to match my local network pool address
with the router being the hctp host.
I can connect to the router from my network, but I can not connect to the
internet from my network.
Is there something I am missing?
Thank you
!This is the running config of the router:
!version 12.4
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service sequence-numbers
hostname xxxx
logging buffered 51200 debugging
logging console critical
enable secret 5 xxxxxx
no aaa new-model
resource policy
clock timezone London 0
clock summer-time London date Mar 30 2003 1:00 Oct 26 2003 2:00
ip subnet-zero
no ip source-route
ip cef
no ip dhcp use vrf connected
ip dhcp pool XXXXXXX-Pool
import all
ip inspect name DEFAULT100 cuseeme
ip inspect name DEFAULT100 ftp
ip inspect name DEFAULT100 h323
ip inspect name DEFAULT100 icmp
ip inspect name DEFAULT100 netshow
ip inspect name DEFAULT100 rcmd
ip inspect name DEFAULT100 realaudio
ip inspect name DEFAULT100 rtsp
ip inspect name DEFAULT100 esmtp
ip inspect name DEFAULT100 sqlnet
ip inspect name DEFAULT100 streamworks
ip inspect name DEFAULT100 tftp
ip inspect name DEFAULT100 tcp
ip inspect name DEFAULT100 udp
ip inspect name DEFAULT100 vdolive
ip tcp synwait-time 10
no ip bootp server
ip domain name xxxxxxx
ip name-server
ip ssh time-out 60
ip ssh authentication-retries 2
crypto pki trustpoint TP-self-signed-xxxxxxx
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-xxxxxxx
revocation-check none
rsakeypair TP-self-signed-xxxxx
crypto pki certificate chain TP-self-signed-xxxxxx
certificate self-signed 01
username xxxxx
bridge irb
interface ATM0
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
ip route-cache flow
no atm ilmi-keepalive
dsl operating-mode auto
interface ATM0.1 point-to-point
description $ES_WAN$$FW_OUTSIDE$
pvc 0/38
encapsulation aal5mux ppp dialer
dialer pool-member 1
interface FastEthernet0
interface FastEthernet1
interface FastEthernet2
interface FastEthernet3
interface Dot11Radio0
no ip address
encryption mode wep mandatory
ssid xxxxxx
authentication open
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0
48.0 54.0
channel 2462
station-role root
bridge-group 1
bridge-group 1 spanning-disabled
interface Vlan1
no ip address
bridge-group 1
interface Dialer0
description $FW_OUTSIDE$
ip address negotiated
ip access-group 101 in
no ip redirects
no ip unreachables
no ip proxy-arp
ip inspect DEFAULT100 out
ip nat outside
ip virtual-reassembly
encapsulation ppp
ip route-cache flow
dialer pool 1
dialer-group 1
no cdp enable
ppp authentication chap callin
ppp chap hostname xxxxxx
ppp chap password xxxxxxx
interface BVI1
description $ES_LAN$$FW_INSIDE$
ip address
ip access-group 100 in
ip nat inside
ip virtual-reassembly
ip tcp adjust-mss 1452
ip classless
ip route Dialer0
ip http server
ip http authentication local
ip http secure-server
ip http timeout-policy idle 600 life 86400 requests 10000
ip nat inside source list 1 interface Dialer0 overload
logging trap debugging
access-list 1 remark INSIDE_IF=BVI1
access-list 1 remark SDM_ACL Category=2
access-list 1 permit
access-list 100 remark auto generated by Cisco SDM Express firewall
access-list 100 remark SDM_ACL Category=1
access-list 100 deny ip host any
access-list 100 deny ip any
access-list 100 permit ip any any
access-list 101 remark auto generated by Cisco SDM Express firewall
access-list 101 remark SDM_ACL Category=1
access-list 101 permit udp host eq domain any
access-list 101 deny ip any
access-list 101 permit icmp any any echo-reply
access-list 101 permit icmp any any time-exceeded
access-list 101 permit icmp any any unreachable
access-list 101 deny ip any
access-list 101 deny ip any
access-list 101 deny ip any
access-list 101 deny ip any
access-list 101 deny ip host any
access-list 101 deny ip host any
access-list 101 deny ip any any
dialer-list 1 protocol ip permit
no cdp run
bridge 1 protocol ieee
bridge 1 route ip
banner login ^CAuthorized access only!
Disconnect IMMEDIATELY if you are not an authorized user!^C
line con 0
login local
no modem enable
transport output telnet
line aux 0
login local
transport output telnet
line vty 0 4
privilege level 15
login local
transport input telnet ssh
scheduler max-task-time 5000
scheduler allocate 4000 1000
scheduler interval 500
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dsl operating-mode ansi-dmt
and if that doesn't help, configure 'ip mtu 1452' under the dialer interface configuration.
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