Why won't my 1900 series CISCO router connect to the internet

We just got a 1900 series Cisco router and after setting it up, I can see the network with it and ping it, but cannot get to the internet from it.  Here is the config:
Using 1500 out of 262136 bytes
!
! Last configuration change at 01:13:30 UTC Mon Mar 14 2011
!
version 15.0
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname CasinOmahaRouter
!
boot-start-marker
boot-end-marker
!
enable secret 5
enable password @!
no aaa new-model
!
!
no ipv6 cef
no ip routing
no ip cef
!
ip name-server 207.5.120.16
ip name-server 207.5.120.17
ip name-server 66.37.236.22
!
multilink bundle-name authenticated
!
license udi pid CISCO1921/K9 sn FGL15042EK1
!
redundancy
!
interface GigabitEthernet0/0
 description To Internet
 ip address 10.236.15.??? 255.255.254.0
 ip nat outside
 ip virtual-reassembly
 no ip route-cache
 duplex auto
 speed auto
 !
!
interface GigabitEthernet0/1
 description XXX Network
 ip address 192.168.1.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly
 no ip route-cache
 duplex auto
 speed auto
 no mop enabled
interface Serial0/0/0
 no ip address
 no ip route-cache
 shutdown
 no clock rate 2000000
 !
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
ip nat inside source list 101 interface GigabitEthernet0/0 overload
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0
ip route 0.0.0.0 0.0.0.0 10.236.14.1
!
access-list 101 permit ip 192.168.1.0 0.0.0.255 any!
control-plane
line con 0
line aux 0
line vty 0 4
 password
 login
!
scheduler allocate 20000 1000
end

And these are the settings for our current router:
ip address 10.236.15.???
subnet mask 255.255.254.0
gateway 10.236.14.1
dns  207.5.120.16
Any help would be very much appreciated!!