help with 2511 configurations

[nettie]

i've two 2511s and two 2501s. one of the 2511s is my access server. i connected the octal cable from the 1-8 asynch port to the console ports of R1, R2 and R3 using the setup and configurations from cisco site at http://www.cisco.com/warp/public/793/access_dial/comm_server.html. i can't access R1, R2 or R3 from the access server. Are there additional setups and/or configurations that i need to do? Below are my configurations for the access server and R1. Note: R1, R2 and R3 have the same configuration. please help. Thanks

ACCESS SERVER CONFIGURATION
conf t
hostname AS
enable secret cisco
line vty 0 4
exec-timeout 0 0
line con 0
transport input all
exec-timeout 0 0
exit
ip host R1 2001 10.0.11.254
ip host R2 2002 10.0.11.254
ip host R3 2003 10.0.11.254
int lo0
ip address 10.0.11.254 255.255.255.0
no ip directed-broadcast
int e0
ip address 10.1.1.1 255.255.255.0
media-type 10baset
no shut
description THIS IS MY ACCESS SERVER
no ip directed-broadcast
int s 0
no ip address
no ip directed-broadcast
shut
int s 1
no ip address
no ip directed-broadcast
shut
exit
line 1 8
session-timeout 0
no exec
transport input all
exec-timeout 0 0
exit
exit
wr mem
copy run start

R1 CONFIGURATION
conf t
hostname R1
enable secret cisco
line vty 0 4
exec-timeout 0 0
int lo0
ip address 10.0.10.254 255.255.255.0
no ip directed-broadcast
int e0
ip address 10.0.1.1 255.255.255.0
no shut
description THIS IS MY FIRST REMOTE ROUTER, R1
no ip directed-broadcast
int s 0
no ip address
no ip directed-broadcast
shut
int s 1
no ip address
no ip directed-broadcast
shut
exit