[olug] Qpest PPPoA authentication?

[Neal Rauhauser]

  I have customer who has agreed to replace their Qwest ActionTech DSL 
modem with a Cisco 1720+WIC-1ADSL.
The config below causes ATM0 to go up/up, I know the userid and password 
I have are correct, but in watching console messages it says I need some 
sort of authorization setting. Has anyone dealt with this before on 
Qwest's network? I played a bit with aaa authorization commands but I 
was just throwing darts - it'd be really nice if someone could cough up 
the one liner I'm missing here ...

interface ATM0
 no ip address
 no atm ilmi-keepalive
 pvc 0 0/32
  encapsulation aal5mux ppp dialer
  dialer pool-member 1
 !
 dsl operating-mode auto

interface Dialer0
 ip address [removed]
 encapsulation ppp
 dialer pool 1
 dialer-group 1
 no cdp enable
 ppp authentication ms-chap
 ppp chap hostname removed
 ppp chap password 0 removed
!
ip route 0.0.0.0 0.0.0.0 Dialer0
dialer-list 1 protocol ip permit