Greetings folks. Hope things have been going well. I've been out of the certification game for a little while (due to purchase of a house, marriage, new job, etc. etc.). I'm getting ready to restart CCNP though, oh joy

I'm seeing a very strange issue that I was hoping one of you guru's could perhaps shed some light on. First though, some back story.
I remembered that folks on this forum like to use the 2509/2511 for console access to their devices so I talked to my coworker about putting one in our data center with a dial up line for out of band access to our devices. Next thing I know, he comes back with a 2511, unearthed from the "pile" and I've been setting it up for the scenario described above.
We've not got our POTS line installed yet, but mostly everything else is done. I can reverse telnet from the 2511 to all of the attached devices. The problem I'm seeing though is that my username/password is failing. I can log on when directly connected to the devices in question via console cable, my coworker can log on via reverse telnet from the 2511 and console cable.
Needless to say, this implementation is of little use to me if I can't log on

There is one solitary device of about 10 that I can log on to and it's a 2600 router with apparently the same console line configs as the other devices. The other inaccessible devices consist of blade center Cisco switches, ASA 5550s, Cat 4948s, F5s, and 2960Gs.
I've tried changing my password to something very uncomplex (I thought maybe the term server wasn't passing certain characters) to no avail.
Here's the config on the access server:
ACCESS_SERVER#sh run
Building configuration...
Current configuration : 5009 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname ACCESS_SERVER
!
boot-start-marker
boot system flash:/c2500-i-l.123-26.bin
boot-end-marker
!
enable secret 5 XXXXX
!
clock timezone EST -5
clock summer-time EDT recurring
aaa new-model
!
!
aaa session-id common
ip subnet-zero
no ip domain lookup
ip domain name XXXXX
ip host XXXXX 2009 XXXXX
ip host XXXXX 2010 XXXXX
ip host XXXXX 2011 XXXXX
ip host XXXXX 2006 XXXXX
ip host XXXXX 2001 XXXXX
ip host XXXXX 2002 XXXXX
ip host XXXXX 2003 XXXXX
ip host XXXXX 2004 XXXXX
ip host XXXXX 2005 XXXXX
ip host XXXXX 2007 XXXXX
ip host XXXXX 2008 XXXXX
!
!
interface Ethernet0
ip address XXXXX 255.255.255.0
!
interface Serial0
no ip address
shutdown
!
interface Serial1
no ip address
shutdown
!
ip default-gateway XXXXX
ip http server
ip classless
ip route 0.0.0.0 0.0.0.0 XXXXX
!
!
snmp-server community XXXXXRO
snmp-server enable traps snmp authentication linkdown linkup coldstart warmstart
snmp-server enable traps tty
snmp-server enable traps syslog
snmp-server enable traps isdn call-information
snmp-server enable traps isdn layer2
snmp-server enable traps isdn chan-not-avail
snmp-server enable traps isdn ietf
snmp-server enable traps hsrp
snmp-server enable traps config
snmp-server enable traps entity
snmp-server enable traps config-copy
snmp-server enable traps bgp
snmp-server enable traps pim neighbor-change rp-mapping-change invalid-pim-message
snmp-server enable traps ipmulticast
snmp-server enable traps msdp
snmp-server enable traps rsvp
snmp-server enable traps frame-relay
snmp-server enable traps frame-relay subif
snmp-server enable traps rtr
banner motd ^C
XXXXX
^C
!
line con 0
exec-timeout 20 0
password 7 XXXXX
stopbits 1
line 1 5
session-timeout 30
no flush-at-activation
no exec
transport input telnet
transport output telnet
line 6
session-timeout 30
no flush-at-activation
no exec
transport input telnet
transport output telnet
speed 38400
line 7 16
session-timeout 30
no flush-at-activation
no exec
transport input telnet
transport output telnet
line aux 0
password 7 XXXXX
modem InOut
transport input all
speed 38400
flowcontrol hardware
line vty 0 4
transport input telnet
!
ntp clock-period 17179969
ntp server XXXXX
end
Thoughts? Thanks in advance.