Help with Config of PIX 515 on DSL with Outside Interface using DHCP

[csdsc]

Could anyone give me assistance on setting up a PIX 515 using OS 5.1(4) where the External (Outside) interface is aquiring its IP via DHCP from the Cable modem or DSL router
I am having difficulty in getting any connection to the outside but the PIX is getting its IP from the DSL router no problem.
Any assistance or pointers would be helpful but I don't have a CCO account therefore i cannot see any thing beyond the Normal cisco info

TIA
Sean Chambers

 

[csdsc]

nameif ethernet0 outside security0
nameif ethernet1 inside security100
interface ethernet0 auto
Interface ethernet1 auto
ip address outside dhcp setroute
ip address inside 10.1.1.254 255.255.255.0

dhcpd address 10.1.1.1-10.1.1.20
dhcpd dns <your isp dns 1> <your isp dns 2>
dhcpd wins <wins server of your choice>
dhcpd lease 3000
dhcpd domain yourdomain.com
dhcpd enable

arp timeout 14400
nat (inside) 1 0 0
global (outside) 1 interface
no rip inside default
no rip inside passive
no rip outside default
no rip outside passive

timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00
udp 0:02:00 rpc 0:10:00 h323 0:05:00
sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
access-list acl_grp permit icmp any any
access-group acl_grp in interface inside
access-group acl_grp in interface outside
no snmp-server location
no snmp-server contact
snmp-server community public
telnet 10.1.1.254 255.255.255.255
telnet timeout 15
mtu outside 1500
mtu inside 1500